Blood pressure ≤150/90 mmHg (n = 7456)
Clinical indicator	β	SE(β)
Characteristic
Intercept	76.197	0.508
Area
Density (people per hectare 2001)	–0.155	0.130
Index of Multiple Deprivation	–0.312b	0.112
Patients
≥65 years of age	–0.455b	0.158
% Member of racial or ethnic minority	–0.275	0.151
Disease prevalence
Unadjusted prevalence	0.376b	0.140
Practice
Size of practice population	–0.411c	0.097
List size per FTE GP	–0.132	0.105
Single-handed practice	0.986b	0.343
Primary medical services contract	–0.449a	0.184
GPs
≥45 years of age	0.036	0.104
% Female GPs	0.005	0.098
% GPs qualified in UK	0.167	0.131
Exception reporting
Hypertension blood pressure recorded	0.401c	0.102
Hypertension blood pressure ≤150/90 mmHg	0.981c	0.140
Practice nurses
List size per FTE practice nurse (quintiles)
1st ≤3038.01	–0.548	0.535
2nd 3038.02–3901.48	–0.459	0.542
3rd 3901.49–4823.44	–0.303	0.523
4th 4823.45–6210.68	–0.440	0.555
5th ≥6210.69	–0.490	0.559
No practice nurse	0.000
Global test for effect of nurse staffing –2 log likelihood (IGLS)
Model without practice nurse variable	51490.410
Model with practice nurse variable	51488.852
Difference in log likelihood (5df)	1.558
P-value	0.91
Variance
PCT level	3.436	0.451
Practice level	44.371	1.038

df = degrees of freedom. FTE = full-time equivalent. SE = standard error..

^aP<0.05;

^bP<0.01;

^cP<0.001.