HbA1c ≤7.4% (n = 7456)		HbA1c ≤10% (n = 7456)		Blood pressure ≤145/85 mmHg (n = 7456)		Total cholesterol ≤5 mmol/l (n = 7456)
Clinical indicator	β	SE(β)	β	SE(β)	β	SE(β)	β	SE(β)
Characteristic
Intercept	60.076	0.737	90.006	0.443	74.720	0.758	77.294	0.631
Area
Density (people per hectare 2001)	–0.035	0.160	–0.275c	0.076	0.007	0.166	–0.091	0.123
Index of Multiple Deprivation	–0.460b	0.155	–0.517c	0.069	–0.001	0.144	–0.140	0.126
Patients
≥65 years of age	1.599c	0.172	0.884c	0.081	–0.552c	0.166	0.377a	0.158
% Member of racial or ethnic minority	–1.529c	0.187	–0.586c	0.090	–0.427a	0.198	–0.508b	0.158
Disease prevalence
Unadjusted prevalence	0.689b	0.245	–0.070	0.101	–0.031	0.169	0.158	0.150
Practice
Size of practice population	–0.066	0.108	0.115a	0.051	–0.282a	0.122	0.000	0.093
List size per FTE GP	0.148b	0.052	–0.002	0.048	–0.039	0.082	–0.041	0.047
Single-handed practice	–0.047	0.394	–0.544a	0.251	0.205	0.416	–0.007	0.313
Primary medical services contract	0.282	0.214	0.108	0.111	–0.183	0.239	0.101	0.193
GPs
≥45 years of age	–0.523c	0.116	–0.250c	0.056	–0.079	0.125	–0.315b	0.113
% Female GPs	0.851c	0.114	0.537c	0.063	0.205	0.138	0.546c	0.111
% GPs qualified in UK	0.615c	0.159	0.703c	0.095	0.667c	0.157	0.939c	0.130
Exception reporting
HbA1c recorded	–0.128	0.132	0.093	0.067
HbA1c ≤7.4%	4.060c	0.132
HbA1c ≤10%			2.051c	0.074
Blood pressure recorded					0.668c	0.160
Blood pressure ≤145/85 mmHg					–0.197	0.157
Total cholesterol							–0.474c	0.121
Total cholesterol ≤5 mmol/l							3.669c	0.116
Practice nurses
List size per FTE practice nurse (quintiles)
1st ≤3038.01	2.249b	0.713	1.763c	0.449	0.679	0.715	1.862b	0.632
2nd 3038.02–3901.48	2.046b	0.695	1.639c	0.440	0.578	0.751	1.537a	0.619
3rd 3901.49–4823.44	1.505a	0.718	1.420b	0.438	0.362	0.751	1.335a	0.655
4th 4823.45–6210.68	1.193	0.726	1.499b	0.460	0.598	0.759	1.754b	0.670
5th ≥6210.69	0.776	0.695	0.915a	0.425	–0.015	0.786	1.122	0.648
No practice nurse	0.000		0.000		0.000		0.000
Global test for effect of nurse staffing –2 log likelihood (IGLS)
Model without practice nurse variable	52990.910		43200.699		54991.270		51088.563
Model with practice nurse variable	52955.133		43143.883		54985.156		51069.234
Difference in log likelihood (5df)	35.777		56.816		6.114		19.329
P-value	<0.001		<0.001		0.30		0.0017
Variance
PCT level	23.490	2.382	2.022	0.274	4.006	0.609	8.426	0.862
Practice level	52.617	1.271	14.768	0.751	74.060	1.641	42.346	1.073

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

^aP<0.05;

^bP<0.01;

^cP<0.001.