the Carr-Hill allocation formula is used to adjust the global sum total for a number of local demographic and other factors which may affect Practice workload. for example, a Practice with a large number of elderly patients may have a higher workload than one which primarily cares for commuters.
factors included in the Carr-Hill formula :-
patient age and gender (used to reflect frequency of home and surgery visits) additional needs: Standardised Mortality Ratio and Standardised Long-Standing Illness for patients under the age of 65 years number of newly registered patients (generate 40% of work in 1st year) rurality costs of living in some area (ie South East - ? higher staff costs) patient age/gender for nursing/residential consultations.