Characteristic	Source
Geographic area
Density, people per hectare 2001	Office for National Statistics
Index of Multiple Deprivation	Office for National Statistics
Good self-rated health, %	Office for National Statistics
Patients
≤15 years of age, %	National Primary Care R&D Centre, University of Manchester
≥65 years of age, %	National Primary Care R&D Centre, University of Manchester
Female, %	National Primary Care R&D Centre, University of Manchester
Member of racial or ethnic minority, %	National Primary Care R&D Centre, University of Manchester
Disease prevalence
Unadjusted prevalence	NHS Information Centre
Practice
Size of practice population	National Primary Care R&D Centre, University of Manchester
List size per FTE GP	National Primary Care R&D Centre, University of Manchester
Single-handed practice	National Primary Care R&D Centre, University of Manchester
Primary medical services contract	National Primary Care R&D Centre, University of Manchester
Family practitioners
≥45 years of age, %	National Primary Care R&D Centre, University of Manchester
Female GPs, %	National Primary Care R&D Centre, University of Manchester
GPs qualified in UK, %	National Primary Care R&D Centre, University of Manchester
Practice nurses
List size per FTE practice nurse (quintiles)	Binleys and NHS Healthcare Workforce