Do longer consultations improve the management of psychological problems in general practice? A systematic literature review

1472-6963-7-71 1472-6963 Research article Do longer consultations improve the management of psychological problems in general practice? A systematic literature review Hutton Catherine cathyhutton@bigpond.com Gunn Jane j.gunn@unimelb.edu.au

General Practice, Moonee Ponds, Victoria, 3039, Australia

Primary Care Research Unit, Department of General Practice, The University of Melbourne, Berkeley St, Carlton, Victoria, 3053, Australia

BMC Health Services Research 1472-6963 2007 7 1 71 http://www.biomedcentral.com/1472-6963/7/71 17506904 10.1186/1472-6963-7-71 18 9 2006 17 5 2007 17 5 2007 2007 Hutton and Gunn; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background

Psychological problems present a huge burden of illness in our community and GPs are the main providers of care. There is evidence that longer consultations in general practice are associated with improved quality of care; but this needs to be balanced against the fact that doctor time is a limited resource and longer consultations may lead to reduced access to health care.

The aim of this research was to conduct a systematic literature review to determine whether management of psychological problems in general practice is associated with an increased consultation length and to explore whether longer consultations are associated with better health outcomes for patients with psychological problems.

Methods

A search was conducted on Medline (Ovid) databases up to7 June 2006. The following search terms, were used:

general practice or primary health care (free text) or family practice (MeSH)

AND consultation length or duration (free text) or time factors (MeSH)

AND depression or psychological problems or depressed (free text).

A similar search was done in Web of Science, Pubmed, Google Scholar, and Cochrane Library and no other papers were found.

Studies were included if they contained data comparing consultation length and management or detection of psychological problems in a general practice or primary health care setting. The studies were read and categories developed to enable systematic data extraction and synthesis.

Results

29 papers met the inclusion criteria. Consultations with a recorded diagnosis of a psychological problem were reported to be longer than those with no recorded psychological diagnosis. It is not clear if this is related to the extra time or the consultation style. GPs reported that time pressure is a major barrier to treating depression. There was some evidence that increased consultation length is associated with more accurate diagnosis of psychological problems.

Conclusion

Further research is needed to elucidate the factors in longer consultations that are associated with greater detection of psychological problems, and to determine the association between the detection of psychological problems and the attitude, gender, age or training of the GP and the age, gender and socioeconomic status of the patient. These are important considerations if general practice is to deal more effectively with people with psychological problems.

Background

The consultation is a crucial component of general practice. It is how general practitioners (GPs) organise their days, is often related to how they get paid, and is used to assess the quality and impact of their practice. For at least three decades there has been discussion on how to achieve what has been described as "the exceptional potential of each consultation 1". This is driven in part by the concern that time pressure is a limiting factor in the standard of general practice care provided 2345.

Psychological problems present a huge burden of illness in our community, depression being listed as the fourth most prevalent chronic illness 6. GPs are the main providers of care to those with psychological problems 7. In Australia, between 2000 and 2002, psychological problems were managed at a rate of 11.5/100 general practice encounters 8. But in the United Kingdom up to 40% of patients presenting to general practice are psychologically distressed as measured by screening tools, such as the General Health Questionnaire 9. So it is possible that the patients recognised by GPs may be a small percentage of the total number of those suffering from mental illness 10. Some believe that only about half of patients with psychological problems will be recognised if they do attend general practitioners 11.

Alongside these findings are workforce issues and GP shortages. Australia 12, UK 13, USA 1415 and Canada 16 face medical workforce shortages which are compounded by changing demographics, including feminization, and doctors working less hours 17. China 18 and many African 19 countries also have severe workforce shortages that are worsened by the emigration of physicians to developed countries 20.

Doctor time is an important resource for our community. Doctors spend time "in face-to-face contact with patients..., doing administrative work related to visits, and maintaining a knowledge base. Importantly, time is always finite: no mater what demands" a doctor " faces, there are only 24 hours a day"21. Time management for GPs has become a crucial issue. There is increasing evidence that links longer consultations with improved quality of care 5222324 but there is appropriate concern that longer consultations will lead to reduced access to GPs and the inability for patients to be seen in a timely manner

Of course, available evidence on the benefits of longer consultations has to be weighed against the provision of acute services to the community and patients' needs and expectations.

Previous literature reviews

Prior to commencing this review we identified five previous relevant literature reviews published between 1992 and 2002 that focussed on factors associated with consultation length in general practice. However, none included clinical outcome measures, randomised controlled trials or specifically explored the management of common psychological problems, such as depression.

Wilson et al 2 reviewed 42 papers to examine "historical and international comparisons of consultation length" and discussed factors that determine consultation length concluding that the mean consultation length in UK had increased, and that "doctor factors" determined the length of consultation rather than differences between patients.

Groenewegen and Hutten 21 in the Netherlands reviewed the literature on "determinants and consequences of workload and job satisfaction of GPs" and concluded that the length of consultation was an important determinant for "workstyle" and quality of work. They found that the length of consultation was determined by both patient-initiated demand and by management decisions of the GP.

In the USA, Dugdale et al 22 explored the effects of limiting time on the doctor-patient relationship and concluded that the visit rate of greater than 3 or 4 patients/hour may lead to "suboptimal visit content, including decreased patient satisfaction and increased prescribing."

Freeman et al 5 reviewed outcomes of the debate about length of consultation and reported longer consultations were associated with a "range of better patient outcomes, particularly better recognition and handling of psychological problems", and recommended that longer consultations should be a priority.

Recently, Wilson and Childs 23 published a systematic literature review of thirteen papers in which they explored associations between consultation length and consultation process and "process and healthcare" outcomes. They concluded that the evidence suggests that a patient "seeking help from a doctor who spends more time with them is more likely to have a consultation that includes important elements of care."

We set out to gather together and review the published literature exploring the associations between consultation length and the management of psychological problems.

Methods

A search was conducted for English language publications on Medline (Ovid) databases up to 7 June 2006. A similar search was done in Web of Science, Pubmed, Google Scholar, and Cochrane Library and no other papers were found. The following search terms, including Medical Subject Headings (MeSH) were used:

general practice or primary health care (free text) or family practice (MeSH)

AND consultation length or duration (free text) or time factors (MeSH)

AND depression or psychological problems or depressed(free text).

105 possible papers were found in this way.

Studies were included if they contained data on consultation length and factors related to the detection and management of psychosocial problems in a general practice or primary care setting. Eleven studies of the original 105 met the inclusion criteria. The reference lists of the 11 identified articles were checked and all additional relevant articles included. Other relevant papers by the included authors were retrieved and read. Finally, 29 possible articles were identified for inclusion in the review.

CH read and re-read the papers in conjunction with JG. The studies were then arranged into tables, listing the aims, methods, data and findings. This enabled data extraction in a systematic way. A thematic analysis was undertaken by CH and themes were refined after discussion with JG.

Results

According to these inclusion criteria, 29 papers were eligible for this review. The majority of the studies were observational, cross-sectional studies. There were two intervention studies published in three papers. No meta-analysis of published studies and no relevant randomised controlled trials were identified

Quality of included studies

The quality of studies varied widely and is discussed below providing examples. Further information is included in Tables 1, 2 and 4.

Table 1

Studies based on interviews of doctors about consultation length and the management of psychological problems

Author/year/location

Aim

No. of practices/doctors

No of patients/consultation

Mean consult'n length

Method of measuring consult'n length

Method of study

% of eligible doctors particip'ing

Conclusions/findings

Rost USA 1994 [28]

To describe preferences & barriers to rural primary care physicians treating depression

Semistructured Interviews

86% Random sample

30% of primary care physicians state that lack of time, & 23% that patient not recognising problem, is the biggest barrier to treating depression

Howe 1996 UK [44]

To assess factors that influence GPs' identification of psychological distress

-/19 GPs, random sample in Sheffield

GPs sent postal 'questionnaire, then semi-structured interviewed

Time shortage recorded as factor in 15/19

Pollock 2003 UK [31]

To investigate GP perspectives on consultation times and the management of depression in general practice

8/19 Not representative

8–10 mins booking times

Qualitative, cross-sectional GP semi-structured interviews

Dealing with depression, particularly first consultation, takes longer. GPs accommodate this by running over time.

Smith 2004 UK [32]

To explore GPs' views on clinical guidelines on management of depression & barriers to use

-/11. Picked to representative of GPs

5–10 minute booking interval

Qualitative, cross-sectional In-depth interviews with GPs

73%

Lack of time major barrier to guideline use

Table 2

Aims and methodology of cross-sectional studies on consultation length and the management of psychological problems.

Author/year

Aim

Duration

No. of practice/doctors

No of patients/consult'n

Mean consult'n length

Method of measuring Consult'n length

Type and method of study

% of eligible participating

Westcott UK 1977 [25]

To study length of general practice consultations and patient characteristics.

2 weeks

1/1-the author

182 patients

8.66 mins

Timed by doctor

Quantitative

Data recorded by doctor

100% of all surgery consultation.

Raynes UK 1980 [38]

To determine which characteristics of GPs, patients & consultations contribute to differences in consultation length, esp. with psychosocial problems.

-/10

264

4.2–8.7

Recorded by non-participating observer

Quantitative

Consultations observed and analysed, GP questionnaire

Only 4 patients refused.

1.5%

Hughes UK 1983 [3]

To assess whether length of booked appointments affected consultation outcomes

12 weeks

2/6

1652 consultations

Practice A: 8 min, 4 secs. Booked 10 m Practice B: 5 min 18 s. Booked 5 min

Timed over some sessions

Quantitative

Doctor filled encounter forms

-Not stated

Whitehouse UK-Manchester 1987 [29]

To study factors that influence the management of psychosocial illness in general practice

-/201

6870 consultation with psychosocial diagnosis,

<6, 6–6.99, 7–7.99, >8

Recorded by doctor

Quantitative

Doctor encounter forms

40%, representative sample

Andersson 1989 Sweden [37]

To test hypothesis that longer consultations provide greater satisfaction to the doctor & patient.

20–40 consec. Consult'ns

4/7 male doctors with interest in research

160 consultations

21 mins

Doctor recorded-from greeting to farewell

Quantitative

Doctor and patient questionnaire

-Not stated

Howie UK-Lothian (Scotland 1991/1989 [24, 36]

To examine association between different consulting styles, consultation length & prescribing, between quality of consultation, working style of doctors and length of consultation, (slow, intermediate and fast).

1 year

-/85

21,707, 1787 for RTI

Fast <7 mins, Intermediate = 7–8.99, Slow >9 mins

Timed by doctor

Quantitative

Doctor completed encounter forms, some patient questionnaires

17%

Andersson Sweden 1993 [52]

To study factors assoc with short and long consultations

80 consec. consult'ns

3/6-all male

80 each doctor

66 consultations <10 mins, 314 between 11–30 mins 83 >31 mins

Recorded by doctor

Quantitative

Patient questionnaires GP questionnaires

96.4%

Winefield Australia 1996 [40]

To assess relation between patient-centredness (PC), patient satisfaction and consultation length.

Consecutive appointments

-/21

10 per doctor = 210

16.9 mins for high doctor PC, 10.6 mins for low

Audiotapes

Quantitative

Consultations audio taped and analysed for PC

41% GPs 82.5% patients

Martin Australia 1997 [45]

To assess characteristics of longer billed consultations.

1984–1992

-/-

Longer consultations>20 or >25 mins Mean = 14.6 mins [54]

Medicare data. Aust Morbidity & Treatment survey ACT Record Linkage survey

Quantitative

Retrospective analysis

Data from government records

AMTS-50.4%

ACT Record Linkage Survey- 94% [48]

Carr-Hill UK 1998 [39]

To study characteristics of patients, GPs and practices associated with variation in consultation length.

2 weeks

10/51

836

GP averages between 4.4–11.0 mins

time with patient, measured by research nurse who sat in

Quantitative Research nurse sat in consultation & recorded data.

Not stated

Blumenthal Boston USA 1999 [30]

To determine the patient, practice, physician and visit characteristics that affect consultation duration.

-/686

Random sample picked from 19,192

16.3 mins

Recorded by office staff

Data obtained from 1991–1992 National Ambulatory Medical Care Survey & physician interviews Encounter forms

72% of a random sample of doctors

Howie

UK 1999 [26]

To study relationship between, patient enablement scores, consultation length & quality as measured from NHS data.

2 weeks

53/221

25994

Doctor timed

Quantitative Doctor encounter forms & survey, patient questionnaires

38%

Stirling UK, Glasgow 2001 [9]

To examine factors in GP associated with diagnosis & management of psychosocial distress and consultation length

6 months

9 (all accredited for training)/21

1075 consult'ns (about 50 each GP)

8.71 mins (SD = 4.4)

Timed by observer in waiting room

Quantitative Patients completed GHQ-12 and questionnaire, GP rated psychological distress

Not stated

Not representative

Harman New York, USA 2001 [42]

To determine the factors in a doctor's visit associated with recognition of depression

17058 consult'ns

16.4 mins without depression, 19.3 mins with depression

Recorded by doctor

Quantitative Data from National Ambulatory Medical Care Survey, 1998 Encounter forms

67.9% of doctors, random sample

Deveugele Belgium, Spain, UK, Switzerland., Germany, Netherlands 2002 [43]

To explore the determinants of consultation length in general practice across six European countries

190

3674

G = 7.6, Sp = 7.8, UK = 9.4, N = 10.2, B = 15, SW = 15.6 mins

Measured by stopwatch

Quantitative Videotaped consultations

79% of patients

Telford 2002 UK [34]

To survey GPs' views on barriers to the provision of good management of depression

-/1703

Qualitative, cross-sectional GPs sent postal questionnaire

48%

Tahepold Estonia, 2003 [41]

To study influence of patients' age, gender & problem on length of consultation.

-/27

405

9.0 mins

Videotaped

Quantitative Videotaped consecutive consultations, analysed

98% of patients Doctors not stated

Britt Australia 2004 [17]

To examine relations between billed consultation length and content.

Apr 2000 – Mar 2002

-/2811

101112

<20 mins, >20 mins Mean = 14.6 mins [54]

Doctor recorded & Medicare data

Quantitative Doctor encounter forms & Medicare item number.

26.1% of random sample of GPs Features of GPs stated [49].

Britt Australia 2005 [27]

To measure effect on consultation length of GP, practice & patient characteristics.

Jan 2001–Dec 2002

-/1904

70758

14.6 mins [54]

Recorded by doctor

Quantitative analysis of data from BEACH study

21.6% of a random sample of GPs. Features of GPs stated [47]

Zantigne The Netherlands 2005 [33]

To investigate whether GPs' workload in consultations is related to psychological or social problems of patients

2000–20002

-/142

1392 consult'ns

9.06–12.65 mins

Videotaped

Quantitative analysis of data from Second Dutch National Survey of General practice

73% of GPs

88.1% of patients

66% consultations

Wright [35]2005 Australia

To study needs of rural GPs, esp in care of depressed patients

-/99. 63 male, 36 fem

Quantitative GP sent postal survey

55%

Study size

Sample sizes ranged from one where Westcott 25 studied himself, to Britt et al 17who looked at evidence from over 100,000 consultations with 2,811 doctors.

Selection of participants

The majority of papers used non-random selection methods, usually volunteers, though six, Howie et al 26, Britt et al 1727 Rost et al 28, Whitehouse 29 and Blumenthal et al 30 state that they selected a random sample of doctors. Three authors selected the sample of doctors to be representative 313233 and three invited all the doctors in a particular geographic area 24343536. Whitehouse reported on data from 40% of practices in five health districts in the UK 29. Some used clearly non-representative samples, for example, Westcott 25 studied one doctor, himself, Andersson et al 37 obtained data from 6 male doctors, all of whom were involved in research, and Stirling et al 9 only included doctors accredited for training.

16 authors reported the participation rates in their papers (see Tables 1, 2 &3), some described the features of the doctors or included practices 917272830343839404142. Four authors compared the features of the participating sample to the non-participating 26293543. For example, Deveugle et al 43 and Howe 44 compared the features of those patients and doctors that participated to a representative sample. Deveugle et al reported that doctors involved in the study had a lower workload were more likely to be female and based in a city practice. Zantinge et al stated their sample was "representative for the Dutch population of GPs with regard to age, sex, education, length of residence, degree of urbanisation and number of working hours" 33.

Table 3

Relevant data and conclusions of cross-sectional studies on consultation length and management of psychological problems.

Author

Analysis/key data

Conclusions/findings

Westcott 1977 [25]

Psychoneurotic conditions were significantly assoc with longer consultations longer than the median (p < 0.001) mean = 14.14 mins(5–32) Shorter consultations for age group 15–29 years and for lower socioeconomic class.

Psychoneurotic consultations are associated with longer consultations

Raynes 1980 [38]

GPs with positive orientation to mental health spent longer with patients (p < 0.05). Focus on psychosocial matters (p < 0.01), diagnosis of psychological problem & prescription of psychotropic drug resulted in longer consultation

Diagnosis and management of psychological disorder took longer.

Hughes 1983 [3]

Comparison of results between faster & slower practice. Practice A (mean = 8 mins) 7.5% psych diagnosis. Practice B(mean = 5 mins), 7.1%.

No significant difference in psychological problems managed

Whitehouse 1987 [29]

In consultations <6 minutes, 60%of doctors recorded less than 6.3%rate of psychosocial diagnosis. For consultations >8 mins, 34% of doctors recorded over 10% rate., p,0.05, df = 12, x2 = 25

Increasing consultation time assoc with increased diagnosis of psychosocial illness.

Andersson 1989 [37]

Consultations with psychological problems were longer than those with physical, (mean 28 vs 14 minutes).

Consultation for psychological problem took longer compared to physical

Howie 1991 [36]/1989 [24]

Increased cons length assoc with greater recognition & management of chronic illness & psychosocial problems P < 0.05.

"Faster" doctors were less likely to deal with a psychosocial problem in depth, when detected p < 0.09

Increased consultation length associated with increase chance of GP dealing with detected psychosocial problem.

Longer consultations assoc with reduced prescribing.

Andersson 1993 [52]

The "doctors speed" contributed to 22.5%, the character of the problem 11.6%, the age of the patient 2.9% and the patients sex 0.4%, with coefficient of determination R2 = 0.374. Majority (41% according to dr, 69% according to patient) of short consultations are entirely physical.

The consultation length mainly associated with the doctors "speed" and patient factors including psychological problem and age.

Rost 1994 USA [28]

30% of primary care physicians state that lack of time, & 23% that patient not recognising problem, is the biggest barrier to treating depression

30% of primary care physicians state that lack of time is the biggest barrier to treating depression.

Winefield 1996 [40]

Consultations in top quartile of Patient centerness, compared to bottom quartile, lasted longer (p < 0.001), dealt with more psychosocial or complex problems, had more pt satisfaction (p < 0.05) and same dr satisfaction (p < 0.05), x2 (2d.f.) = 28.84

Patient centred consultations are likely to be longer and include psychological or complex problems.

Martin 1997 [45]

Longer consultations more likely than standard consultations to deal with psychological problems (OR, 2.06; 95%CI 1.83–2.32)

Longer consultations more likely to deal with psychological problems

Carr-Hill 1998 [39]

Multilevel modelling used to analyse assoc of consultation length and multiple factors including diagnosis, doctor, age & gender, & patient age & gender. Average consultation for ICD VIII (Ears) = 5.0 mins, ICD V (Mental & behavioural) = 8.9 mins. ICD XX (social) = 11.8. Only pregnancy longer

Length of consultation explained by variability amongst patients, the diagnosis, GPs & practices.

Consultation length not a marker of quality

Howie 1999 [26]

Using multiple regression with enablement as outcome variable, the enablement score was most closely linked to duration of consultations and patient knowing doctor well.

Duration of consultation increased for patients with psychological (8.9 mins) or complex problems(9.2 mins) compared to biomedical (7.6 mins).95%CI

Consultation length significant predictor of enablement. Longer consultations for psychological problems(mean = 9.0)

Blumenthal 1999 [30]

Multivariate analysis determined that Psychosocial diagnosis is associated with 9 (6–12)% increase in visit duration, P = <0.001, Age>70, assoc with>11% increase, p < 0.001.

Patient characteristics of increasing age & psychosocial problem are associated with increased duration.

Stirling 2001 [9]

50%increase in consultation length assoc with 32% increase in recognition of psychological distress (95%CI = 10.7–57.3%)

Accurate rating of psychological distress increased with consultation length.

Harman 2001 [42]

Multivariate analysis showing that visits where depression is diagnosed are 2.9 minutes longer on average, 19.3 minutes compared to 16.4 minutes.

Visits with a diagnosis of depression were longer than those without.

Deveugele 2002 [43]

Multilevel analysis with length of consultation a dependent variable. The regression coefficient for diagnosis of psychological problem by the doctor = 0.05(0.08–1.81), for consultation where pt recorded psychosocial aspect important+0.52 (.10–.95)

Increased consultation length associated with positive orientation of doctors to psychosocial problems (not gender); new problems; psychosocial problems perceived by doctor; women patients.

Telford 2002 [34]

GPs believe that time and lack of services are the main obstacles to managing depression, not knowledge or skills.

Tahepold, 2003 [41]

Longest consultation for psychological problem, mean = 11+/- 5.0 mins, p < 0.015.

Older patients and those with psychological problems tend to have longer consultations

Britt 2004 [17]

Psychological problems: 6.7%(6.4–6.4) of consultations<20 mins, 11.6%(11.0–12.2) of longer consultations> 20 mins (95%CI)

Psychological, social & female genital problems more frequently managed in longer consultations. Female doctors have longer consultations.

Britt 2005 [27]

Regression coefficient for Psychological problem = +1.75 mins(1.32–2.18), p < 0.001

Variables with positive effect on consultation length include: Female GP, social, psychological or female genital problem & Chronic disease.

Zantigne 2005 [33]

Consultations with psychological problems are longer than those for somatic problems.12.65 mins compared to 9.06, p < 0.01

Consultations where a GP notices psychological problems make heavier demands on the GPs' workload

Wright 2005 [35]

Ranking of 1–5. Time constraints main barrier to providing care for depressed patients; ranking = 3.04(0.92)

The most common barrier to providing care for depressed patients was "time constraints"

Table 4

Intervention studies assessing the effect of booking interval on psychological diagnosis

Author/year/location

Aim

No. of doctors/practices

No of patients/consultations

Mean consultation length

Method of measuring consultation length

Method of study

% of eligible participating

Analysis

Conclusions/findings

Morrell 1986 [50]

Roland 1986 [53] UK

To measure variables in relation to consultations booked at different intervals

5/1

60 sessions 780 consultations

Booked at 5 mins-mean actual time 5.2; 7.5 mins- 6.7 and 10 mins-7.4 mins.

Booked intervals & Actual time measured on audiotape

Patients non-systematically booked in at varying intervals. Consultations audio taped and analysed. Dr completed encounter sheet Patient questionnaire

80%

20% incomplete

Logistic regression analysis.

Psychological diagnosis more likely to be recorded in consultations booked at longer intervals. Longer consultations associated with more time being spent on history taking.

Risdale 1989 UK [51]

To study the effect of different appointment intervals on process and outcome measures in GP consultations

2/1

961

Booked at 5 mins-mean 6.6;Booked at 10 mins-mean 8;Booked at 15 mins-mean 9.2

Visits audio taped.

Intervention Consultations audio taped and analysed, using same techniques as Morrell and Roland Patient questionnaires

96% of pts agreed to participate. Data complete for 95% of consultations

Regression analysis of various outcome variables.

Increased consultation length assoc with increased doctor questions, patient questions & statements.

Nine papers were part of larger studies 172729303339424345 and in four cases 17274245 the method of selection was obtained from earlier articles or reports 46474849.

Method of data collection

A variety of methods were used for data collection, ranging from self-completed postal surveys, face to face interviews to direct observational methods that were analysed by independent researchers. In three studies GPs were sent surveys through the post 343544 and in four studies semi-structured or in-depth interviews were conducted with GPs 28313244. All the studies based on interviews involved smaller numbers of doctors compared to numbers involved in the postal surveys. Ten of the studies used doctor encounter forms or questionnaires, that were completed at the time of the consultation, eight used patient questionnaires 926363738505152 and in five of these both doctor and patients questionnaires or encounter forms 92426363752 were used to collect data.

Three studies analysed audiotaped recordings of the consultations 40505153, three used videotape recordings 334143 and in two studies there were independent observers who recorded and then analysed the consultations 3839. Two Australian studies used Medicare billing data 1745. Nine studies used data from larger surveys, for example, Britt et al used data from the BEACH survey (Bettering the Evaluation and Care of Health) 1727, Blumenthal et al and Harman et al used data from the National Ambulatory Medical Care Survey 304246, Zantinge et al from the Second Dutch National Survey of General Practice 33 and Deuvegele et al from the Euro-communication study.

All of these larger studies used data recorded by the doctor 172729303339424345.

Estimation of consultation length

Tables 1, 2 and 4 contain information on the method used to measure consultation length for each study. The most accurate method was the recording of the consultations with audiotaping 405051 or videotaping 334143 or use of an independent observer who sat in the same room 3839. In ten cases the consultation length was recorded by the doctor 17242526272936374252. The least accurate method was estimation of consultation length based on the booking interval 3132. Four studies did not include a measurement of consultation length but reported on the views of the GPs 28343544. In two Australian studies Medicare data on billing were used 1745. In these studies the estimate of mean consultation length was obtained from a government report 54.

Diagnosis of psychological problems

In 12 studies the diagnosis of a psychological problem was made by the doctor during the consultation and recorded by the doctor 391724252729303336385051, in one study by both the doctor and by patient questionnaire 9. Only Stirling at al used a recognised screening tool, the General Health Questionnaire-12 (GHQ), to assess accuracy of the GPs psychological diagnosis. In two studies the diagnosis was made by an independent observer by analysis of videotapes 4143.

Time frame

All studies included data on individual consultations only. None of the studies recorded any data over time in order to follow outcomes.

Outcome measurements

Most studies used study-specific questionnaires with only a few using a recognised outcome measure. Howie et al 26 used the "patient enablement" instrument and Winefield et al 40 explored two previously used measures of "patient-centredness". Stirling et al 9 used the GHQ.

Data synthesis

Comparing and contrasting study findings yielded three major themes:

1. Consultations with a recorded diagnosis of psychological problems take longer than consultations without a recorded psychological diagnosis.

2. GPs report that time pressure was one of the main barriers to addressing psychosocial problems.

3. There was some evidence of improved outcomes with longer consultations in the diagnosis of psychological problems.

1. The length of consultation with a recorded diagnosis of psychological problems

Although the studies report different mean lengths of general practice consultations and different methods of measuring consultation length, 14 out of 16 included studies suggest that consultations with a recorded diagnosis of psychological problems take longer.

These results come from studies conducted in a number of countries, including the UK 253839, the USA 30, Sweden 37, Australia 2745 The Netherlands 33 and Estonia 41. This is despite there being a wide variation in the mean lengths of general practice consultations in these countries. Germany and Spain have a mean consultation length of between seven and eight minutes 43, Estonia nine minutes 41, UK 9.4 minutes 43, Netherlands 10.2 minutes 43 and Australia 14.6 minutes 54. Belgium, Switzerland 43 and USA 30 have average consultation lengths between 15 and 20 minutes, and Sweden averages more than 20 minutes.

The studies by Britt et al 1727, Deveugele et al 43, Blumenthal et al 30, Zantinge et al 33and Howie et al 242636 all reported that consultations with a recorded diagnosis of psychological problems take longer. These were large studies with between 1000 to over 100,000 patients, and between 100 to over 1000 doctors. These studies all used rigorous methods including either random selection of participants, use of a representative sample, or description of the participants and/or comparison with non-participants, and analysis techniques involving multilevel or regression analysis.

Deveugele et al compared the length of videotaped consultations across six European countries (Belgium, UK, The Netherlands, Switzerland, Spain, Germany) 43. They found that the type of patient and the recorded problem largely determined the consultation length. They reported that consultations for patients with a diagnosis of psychosocial problems lasted longer than those with only "biomedical problems".

Zantinge et al explored factors related to the workload of GPs and found that consultations with a psychological diagnosis took longer and also that they were associated with a higher mean number of diagnoses and higher assessment (by the doctors) of insufficient time 33.

Even Carr-Hill, who was attempting to disprove the association between consultation length and quality, showed a definite increase in consultation length in consultations with a diagnosis of psychological problems compared to other consultations 39.

Only two studies, Hughes3 in 1983 and Ridsdale et al 51 in 1989, did not find that the length of booked appointments effected the rate of management of psychological problems. However, these studies only studied one or two practices, Hughes did not individually time the consultations 3 and they both reported a rate of 8% or less of diagnosis of psychological problems. Ridsdale et al suggested that the use of small cards used as the medical record in the practices studied inhibited the recording of notes and hence reduced the rate of recording of psychological problems 51.

Otherwise, all the studies concur with the conclusion that consultations with a recorded diagnosis of psychological problems did take longer.

Many of the studies explored possible confounding factors that may influence consultation length. These included consultation style, doctors' attitudes and other "doctor" factors and "patient" factors.

Consultation length and doctors' style

Six 24263640505153 studies explored confounding factors during the consultation that could explain the increase in diagnosis of psychological problems by documenting changes in consultation style with variation in time. Two of these were intervention studies which explored the effect of alteration of the booking interval and hence the time available to the doctor. Morrell et al 50 and Roland et al 53 reported on the same study which demonstrated that increasing the booking interval resulted in longer consultations and greater diagnosis of psychological problems. They also reported a change in communication style in longer consultations, resulting in the physician spending more time talking and listening to the patients, and more psychosocial questions being asked.

Ridsdale et al did a similar study and their results demonstrated that in the longer consultations there was a change in consultation style, or communication patterns, with more doctor questions and explanations, and more patient questions and statements. However, longer consultations did not lead to more psychological diagnoses recorded in the notes 51.

The other four studies exploring consultation style were observational, with no intervention. Howie et al have documented an evolving study of consultation styles and the effect on the consultation length while exploring issues of quality of care 242636. Using observational data Howie et al found that doctors could be grouped as "fast", "intermediate" and "slow". They found that faster doctors were less likely to deal with psychosocial problems and more likely to prescribe 24. They repeated a similar study in 1991 to explore in more depth the differences between "faster" and "slower" doctors and found that "slower" doctors deal with more psychological problems even when they saw patients in shorter consultations 36.

Rather than focus on consultation time alone, some researches have set about to explore styles within the consultation. In 1999, Howie et al used the concept of "patient enablement" and found that consultations with a psychological diagnosis tended to take longer and to be associated with a higher enablement score, as measured by the Patient Enablement instrument. They found that even in short consultations, doctors who were high enablers continued to have a higher enablement score than low enablers. 26.

This evidence is supported by Winefield et al whom assessed the association between consultation length, patient centredness and psychological diagnosis. They reported that consultations in the top quartile for patient-centredness, compared to the bottom quartile, lasted longer and dealt with more psychosocial and complex problems 40.

Consultation length and doctor factors

Three studies explored the doctors' attitude to psychological problems to explain the connection between longer consultations and the increased diagnosis of psychological problems. Deveugele et al 43 and Raynes et al 38 reported that doctors who tend to have longer consultations are more likely to have a positive attitude to psychological problems. Similarly, Howe concluded in her paper that "a GP who adopts a more open consulting style is more likely to improve their performance as a detector of psychological distress" 44.

"Doctor" factors, including age, gender and training, which could be confounding factors for longer consultations were documented in eight studies. Four studies looked at doctor age and gender and its effect on consultation length. Two demonstrated that female doctors tend to have longer consultations 2739 and two did not show this difference 2943. Britt et al 27 showed an increased duration of consultation with increasing doctor age but this was not consistent in other studies 294352. Two studies showed an increase in consultation length with increased doctor training 2745, while three 293943 did not find this difference. There was an expected finding of an increased length of consultations with an increased number of (or with more than one) diagnoses 172733394152.

Consultation length and patient factors

Thirteen of the studies explored "patient" factors associated with longer consultations. Six out of seven studies demonstrated that there was increased consultation length with increasing patient age 273037414352 and one reported changes with patient age that were not linear 38.

Five out of seven studies reported that women patients were found to have longer consultations 1727374352, with Deveugele et al noting that the longest consultations were women with psychosocial problems 43, and Carr-Hill et al reporting that middle-aged women had the longest consultations 39. Two studies did not find this difference 3841. Whitehouse reported that women patients have twice the number of consultations with psychosocial diagnoses 29.

Four out of five studies reported on the association between consultation length and educational level, or socioeconomic status, of the patient. One 45 reported that patients who were well educated were more likely to have longer consultations, three reported that patients with higher SES generally had longer consultations 92527 and one concluded that there was no difference 43.

There were four other reported confounding "patient factors" that were related to a change in the consultation length. Firstly, that "new patients" were associated with longer consultations 172743 and, secondly, that continuity of care (that is, more than one visit with the same doctor) was associated with shorter consultations 263752. Thirdly and not surprisingly, patients presenting with more than one problem were associated with having longer consultations 4345.

Finally, two studies combined doctor and patient factors and reported that female doctors treating female patients have the longest consultations 2739.

2. GPs views on barriers to treating psychological problems

Six papers reported results from surveys and interviews with doctors' about their views on the management of psychological problems, particularly depression. Four were qualitative studies and two quantitative 283132343544.

Four of these studies reported that GPs' believed that time was the major barrier to the management of psychological problems 28323435. Three studies explored other possible barriers to the treatment of depression and reported that access to necessary services and resources, not issues with GPs knowledge or skills, were major obstacles 283234. Pollock et al explored GPs views on the consultation length for patients with depression and reported that GPs believe that consultations for depression were often longer, especially the first consultation, and that GPs accommodated patients with depression by running over time 31. Rost et al also reported that patient factors, particularly the failure of the patient to recognise their depression, were a barrier 28.

Howe reports that GPs believe that they have the necessary skills but that the lack of time is the biggest barrier to effective detection of depression during a consultation44. Five of the GPs in her study "mentioned the likelihood of rating patients as not distressed if they themselves could not face dealing with that aspect of care."

3. Evidence of improved diagnosis of psychological problems with longer consultations

One study used an outcome measurement in the diagnosis of psychological problems. Stirling et al 9 examined factors, including consultation length, associated with accuracy of diagnosis of psychosocial distress in general practice. They measured accuracy by comparing the doctors rating of psychological distress with a GHQ (General Health Questionnaire-12) score completed by the patient. The accurate recognition of psychological distress was greater in longer consultations, with a 50% increase in consultation length being associated with a 32% increase in recognition. They also compared the rating of psychological distress with social deprivation and consultation length, finding that greater socioeconomic deprivation was associated with greater GHQ scores, but that increased social deprivation was associated with shorter consultations.

Discussion

When undertaking this review we deliberately used broad inclusion criteria in an effort to scope the evidence relating to consultation length and management of psychological problems. We initially hoped to answer the important question: "Do longer consultations result in improved outcomes in the management of psychological problems in general practice?" Unfortunately, there was insufficient data to answer this question conclusively and there were a number of important limitations in studies identified.

We identified 29 relevant papers from a mix of western countries, but, despite the consultation being a crucial component of general practice work, all studies reviewed were observational and non-randomised studies. We were unable to identify a single randomised controlled trial where the consultation length had been altered to measure effects on the diagnosis or the management of psychological problems.

Apart from one paper by Stirling et al 9, on accuracy of psychological diagnosis, there were no studies found that explored association between outcome measurements or management options of psychological problems and length of consultation.

Another major weakness is that none of the included studies followed patients to assess progress, all studies involved single visits.

Despite this, there were three possible conclusions. The strength of evidence for these conclusions varies and will be discussed.

1. Consultations with a recorded diagnosis of psychological problems take longer

Despite the mean consultation length varying between countries, evidence from 14 studies from 10 different countries, with a wide range of health systems, payment systems, cultural backgrounds, doctor demand and training demonstrated that consultations with a recorded diagnosis of psychological problems take longer than those without. The studies supporting this conclusion varied in size and methods used. The studies included large and small studies, representative and non-representative samples, consultations were timed in a variety of ways and the diagnosis of psychological problems was made sometimes by the doctor, sometimes by the patient and sometimes by an independent observer.

There were a number of possible confounding factors that may have resulted in changes to the number of recorded diagnoses of psychological problems between longer consultations and "average" consultations.

It may be that in longer consultations, doctors had more time to record more thorough notes.

Although this is a possible explanation, it is disputed by the studies that included patient questionnaires 9, and where the diagnosis of psychological problems was made by independent observers from videotapes 4143.

If we accept that the increase in recorded diagnoses of psychological problems was a real increase, the issue then arises as to whether the consultations took longer because of the diagnosis of a psychological problem, or if the diagnosis was made more often by doctors who tended to have longer consultations? This question is explored further using evidence from this review on the possible effects of the consultation styles, doctor attributes and patient attributes on the length of consultation.

Consultation length and doctors' style

We found evidence from five relevant studies to support the hypothesis that doctors with consultation styles that took more time were more likely to make a psychological diagnosis. Several "doctor styles" were explored and all these styles result in more psychological diagnoses and took more time.

As well, the evidence from the two intervention studies clearly demonstrated changes in consultation style when the doctor had more time 5051. Unfortunately, the intervention studies had limitations as both studies only collected data from one practice each, one 50 in the inner city and the other 51 in a suburban practice. Also, no information was given on the attitudes, ages or styles of the doctors involved in either study.

These studies raise the interesting question about whether it is the time or the doctors' style that was most important in diagnosing psychological problems. More evidence, including randomised controlled trials, is necessary to clarify this hypothesis.

Consultation length and doctor factors

We looked for evidence that reported on doctors' attributes apart from consultation style that may increase the likelihood of a diagnosis of psychological problems and of longer consultations. Two of these studies highlighted the importance of a positive attitude to psychological problems 3843 on the diagnosis rate and Howe commented that doctors sometimes make a "choice" about whether to diagnose and manage the psychological problems presenting in a consultation depending on their "time and energy" 44. This raises the question as to whether this attitude is part of the doctor's character or due to training, and hence whether the selection criteria for medicine and the training are appropriate. It also raised the likely effect of time pressure on a doctors' ability to offer optimal care.

Evidence was presented on other "doctor attributes" that are associated with longer consultations, particularly doctors' age, gender and training. However, this evidence is conflicting and does not clearly demonstrate confounding factors.

Consultation lengths and patient factors

We then looked for data on the patient attributes, apart from psychological problems, which may be associated with an increase in the length of consultations. It appears that increasing patient age is associated with longer consultations 27303738414352. This is important information for health policy-makers who are dealing with ageing populations.

We found that five out of seven studies reported that women patients had longer consultations 17273738414352, especially women patients with psychosocial problems 43 and that women had twice number of consultations with psychosocial diagnoses 29. This raises the question about why women have longer consultations, could they be better at expressing their psychological distress, or do they actually have a higher rate of psychological distress?

There appeared to be an association between increased socioeconomic deprivation and greater psychological distress, but also with shorter consultations9. This "inverse care law" has been further examined by Furler et al who demonstrated that patients in "lower socioeconomic areas receive less longer consultations than those in more advantaged areas" 55.

While it is clear that an increased recording of psychological diagnosis is associated with longer consultations, more research needs to be done to elucidate how these various factors can be explained and to determine the factors that would enable the most time-efficient, most accurate, method of diagnosis of psychological problems.

2.GPs report that time was one of the main barriers to addressing psychosocial problems

The evidence is obtained from six observational, cross-sectional studies 283132343544. The numbers varied from 11 to 1700 doctors but only one study stated that it was representative and none of the studies had analysis involving confidence intervals. Hence, this evidence can only be hypothesis forming.

Despite these weaknesses, the evidence suggests that general practitioners consider it is lack of time, and not lack of knowledge, that is preventing them from achieving better outcomes for psychological problems. Howe raises the interesting question of the doctor's choice in the consultation, about whether to pursue the psychological aspects of a consultation depending on other factors, "time and energy" 44. As Howe put it, GPs "know what to do, but it's not possible to do it." This choice is also reflected in the study by Howie et al where "slower doctors" could work faster if they were under time pressure 26.

This is important information for health policy makers to consider as often it is a perceived lack of skills in general practice that is blamed for deficiencies in the management of psychological illness.

It does, however, contradict other research that shows that GPs will considerably improve the rate of detection of psychological distress with simple training5657. It is likely that both training and time are important.

3. There was evidence of improved diagnosis of psychological problems in longer consultations

Stirling 9 provides the only evidence on containing consultation outcomes, in his study on the accuracy of detection of psychological distress; however, there is no reliable evidence that taking longer is related to improved outcomes in management of psychological problems. It is obvious that more research needs to be done in this area.

Conclusion

From this systematic literature review we can conclude that consultations with a recorded diagnosis of a psychological problem take longer than those with no recorded psychological diagnosis. It is not clear if this is related to the extra time or the consultation style, or other confounding factors. Research is needed to elucidate the factors in longer consultations that are associated with greater detection of psychological problems and to determine whether these are effected by the GPs' attitude, gender, age or training or the patients' age, gender and socioeconomic status. These are important considerations if general practice is to deal more effectively with people with psychological problems.

Competing interests

The author(s) declare that they have no competing interests.

Authors' contributions

CH and JG developed the question, CH performed the literature search, retrieved the papers, performed the data extraction, developed a thematic analysis and wrote the first draft of this paper, JG and CH refined the themes and both authors contributed to subsequent drafts and approved the final version.

Figure 1

Number of included studies and the study types

Number of included studies and the study types.

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