Carr-Hill allocation formula

Last reviewed 01/2018

• the Carr-Hill allocation formula
  • 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.
• The Carr-Hill formula replaced the Jarman index
  • 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.

The formula is applied to practice populations, rather than Primary Care Organisation populations.