Table 2. Demographic and practice determinants of DES funding (£/patient): adjusted regression model

Predictor variable	DES funding model: regression coefficient, B (95% CI)
Practice list size (per 10 000 registered patients)	0.44 (0.32 to 0.56)^a
Single-handed practice	–0.01 (–0.26 to 0.24)
Practice staffing (number of staff per 10 000 registered patients)
GPs	0.09 (0.07 to 0.12)^a
Practice nurses	0.15 (0.11 to 0.19)^a
Administrative staff	0.01 (–0.01 to 0.03)
Direct patient care staff (for example, clinical pharmacists)	0.08 (0.05 to 0.11)^a
Age of registered patients, years
0–4	33.2 (26.0 to 40.4)^a
5–14	–0.49 (–4.33 to 3.36)
45–64	7.49 (5.22 to 9.75)^a
≥65	3.30 (1.38 to 5.23)^b
Social deprivation quintiles of registered patients
Deprivation quintile 1 (least deprived)	ref
Deprivation quintile 5 (most deprived)	–0.35 (–0.60 to –0.10)^b
Deprivation quintile 4	–0.09 (–0.30 to 0.13)
Deprivation quintile 3	–0.03 (–0.22 to 0.17)
Deprivation quintile 2	0.02 (–0.16 to 0.21)
Ethnic group of registered patients
Black	–1.45 (–2.92 to 0.02)
Asian	0.65 (0.07 to 1.23)^c
Region
East of England	ref
London	–0.30 (–0.58 to –0.02)^c
Midlands	0.24 (0.01 to 0.47)^c
North East and Yorkshire	0.49 (0.24 to 0.73)^a
North West	0.19 (–0.07 to 0.44)
South East	0.003 (–0.24 to 0.25)
South West	0.81 (0.32 to 1.10)^a
Practice income (£/100 patients)
Capitation payments	–0.01 (–0.02 to –0.01)^a
QOF payments	0.15 (0.13 to 0.18)^a
MPIG payments	0.01 (–0.14 to 0.11)

Assocations with each predictor are adjusted for the effect of all other predictors in the Table. ^asignificant, P<0.001. ^bsignificant, P<0.01. ^csignificant, P<0.05. DES = directed enhanced services. QOF = Quality and Outcomes Framework. MPIG = minimum practice income guarantee.