Table 3

Baseline characteristics of intervention and controls groups (data are % of group unless otherwise specified)
Control Intervention Standardised difference (%)
Number in group 1098 1219
Number of practices 80 82
Number of patients per practice (median (range)) 10 (1 to 62) 8 (1 to 76)
Index long-term condition
 Chronic Obstructive Pulmonary Disease 47.4 45.0 −4.8
 Diabetes 22.6 27.1 10.4
 Heart failure 30.0 27.9 −4.6
Number of chronic health conditions (mean (SD)) 1.9 (1.8) 1.8 (1.8) −3.9
Site
 Cornwall 32.6 36.5 8.2
 Kent 36.2 32.7 −7.2
 Newham 31.2 30.8 −1.0
Age (mean (SD)) 70.8 (11.8) 69.7 (11.6) −9.3
 Aged under 65 28.7 30.1 3.1
 Aged 65-74 31.4 34.9 7.5
 Aged 75-84 30.9 27.4 −7.7
 Aged 85+ 9.0 7.5 −5.3
Female (%) 40.4 41.1 1.3
Ethnicity
 White 71.3 71.8 1.0
 Non-white 13.2 12.3 −2.7
 Unknown 15.5 15.9 1.2
Area-level deprivation (mean (SD))* 29.8 (13.8) 28.8 (14.9) −6.9
 1st quartile 5.1 8.7 14.3
 2nd quartile 15.4 15.5 0.2
 3rd quartile 31.8 32.6 1.9
 4th quartile 47.7 43.2 −9.2
GP visits per person (prior year) (mean (SD)) 9.0 (7.6) 8.8 (6.8) −2.0
 None 4.5 3.5 −4.8
 1-5 35.2 33.1 −4.6
 6-10 29.0 30.5 3.4
 11-20 23.2 26.4 7.4
 >20 8.1 6.5 −6.3
Practice nurse contacts per person (prior year) (mean (SD)) 6.1 (8.1) 5.3 (7.8) −10.2
 None 14.8 15.5 2.1
 1-5 51.1 57.1 12.1
 6-10 16.4 14.8 −4.5
 11-20 11.9 7.8 −13.9
 >20 5.8 4.8 −4.4
Combined Model score (mean (SD))** 27.0 (20.2) 26.1 (20.1) −4.3
 Low risk 14.6 15.9 3.5
 Moderate risk 30.0 32.1 4.5
 High risk 44.3 41.6 −5.6
 Very high risk 11.1 10.5 −1.9

SD = Standard deviation.

*n(controls) = 1096, n(intervention = 1214). First quartile is least deprived, fourth quartile is most deprived.

**n(controls) = 1,047; n(intervention) = 1,191. Risk categories denote top proportions of site population: very high risk (0.5%), high risk (0.5-5%), moderate risk (5-20%), and low risk (20-100%).

Bardsley et al.

Bardsley et al. BMC Health Services Research 2013 13:395   doi:10.1186/1472-6963-13-395

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