Table 2

Practice (n=140) and patient characteristics (n=2152)
included (n=1745) not included (n=407) P1
Patient level
Age (years): mean (SD) 67.8 (9.9) 69.5 (9.4) 0.002
Gender 0.807
 Female % (n) 31.6 552 3.9 116
 Male % (n) 68.4 1193 69.1 260
Education2 0.489
 <= 9 years % (n) 31.3 (547) 33.2 (116)
 > 9 years % (n) 68.7 (1198) 66.8 (233)
Frequency of practice attendance3 0.028
 <= 3 times / year % (n) 34.2 (596) 41.5 (149)
 4-7 times/ year % (n) 38.7 (675) 33.7 (121)
 > 7 times / year % (n) 22.5 (474) 24.8 (89)
Duration of being patient in practice4 0.415
 up to 2 years % (n) 3.7 (64) 3.8 (14)
 3-7 years % (n) 12.7 (221) 1.2 (38)
 > 7 years % (n) 83.7 (1460) 86.1 (321)
Already been asked for quality assessment5 0.099
 No % (n) 75.5 (1317) 78.7 (266)
 Don’t know % (n) 9.8 (171) 1.9 (37)
 Yes % (n) 14.7 (257) 1.4 (35)
Number of conditions (range: 0–11)6; mean (SD) 3.3 (1.7) 3.0 (1.8) 0.000
Practice level
N (n per practice; range) 131 (13; 6–37) 9 (10; 4–25)
FTE7GP: mean (SD) 1.83 (1.57) 1.95 (1.69) 0.233
Quality management (range: 0–15)8 mean (SD) 9.84 (3.82) 9.42 (3.99) 0.063
CVD care (range: 0–17)8 mean (SD) 8.54 (4.71) 8.84 (4.38) 0.228

1 p values are based on χ2 tests for categorical variables and on t tests for continuous variables.

2 Questionnaire: How many years did you stay at school? < 9 years; 10 – 13 years; > 13 years.

3 Questionnaire: How often do you usually attend your GP within 12 months? 0–1 times; 2–3 times; 4–5 times; 6–7 times; 8–9 times; more than 10 times.

4 Questionnaire: How long have you been a patient with your practice? Less than 1 year; 1–2 years; 3–7 years; 8–12 years; more than 13 years.

5 Questionnaire: Have you ever been asked about the quality of care you receive from your practice (e.g. by questionnaire)? Yes, no, don’t know.

6 Questionnaire: Do you have any one or more of the following diseases or conditions? High blood pressure, Hypercholesterinaemia (high cholesterol), Diabetes, Angina, Heart attack (myocardial infarction), Coronary surgery / PCTA (Percutaneous Transluminal Angioplasty), Heart failure, Transient ischaemic attack (TIA), Stroke, Peripheral artery disease (PAD), Depression – yes, no, don’t know; Yes answers - theoretical range: 0–11; observed range:0–10.

7 FTE= Full time equivalent GP.

8 Theoretical and observed range (Table 1).

Ludt et al.

Ludt et al. BMC Health Services Research 2012 12:221   doi:10.1186/1472-6963-12-221

Open Data