Variable	Sample (n= 320)	National population (n= 8011)	Difference
Continuous variables (means presented)
Number of registered patients	7000.8	7075.6	−74.7
Number of GP FTEs	4.4	4.4	−0.1
Number of GP FTEs per 1000 patients	0.6	0.6	0.0
IMD score	23.8	23.8	−0.1
Categorical variables (percentages presented)
General Medical Services contract	55.6	55.4	0.2
Urban location	84.4	84.5	−0.2
Region of England
North	30.3	30.2	0.1
Midlands and East	29.4	29.4	0.0
London	18.1	18.1	0.0
South	22.2	22.3	−0.1

Data for each variable were obtained from the Health and Social Care Information Centre (hscic.gov.uk; indicators. ic.nhs.uk). FTE = full-time equivalent. IMD = Index of Multiple Deprivation.