Journal of Public Health Medicine 24:252-254 (2002)
© 2002 Faculty of Public Health Medicine of the Royal Colleges of Physicians of the United Kingdom
Availability of primary care doctors and population health in England: is there an association?
Martin C. Gulliford
Department of Public Health Sciences, Kings College London, Capital House, 42 Weston Street, London SE1 3QD. martin.gulliford{at}kcl.ac.uk
Background In the United States, an association has been proposed between better access to primary care and lower mortality. This paper reports an ecological analysis that evaluated whether population health was associated with general practitioner (GP) supply in England.
Methods Data were analysed for 99 health authorities in England in 1999. Health outcomes included standardized mortality ratios, infant mortality rate (per 1000), hospital admissions with acute and chronic conditions (per 100 000), and teenage conception rates (per 1000). The number of GPs per 10 000 population was included as explanatory variable. Confounders included the Townsend deprivation score, proportion of ethnic minorities, proportion in social classes IV and V, and proportion with limiting long-term illness. Analyses were by linear regression weighted for population size.
Results Higher GP supply was associated with lower mortality in univariate analyses. After adjusting for deprivation score, ethnic group and social class, the standardized mortality ratio for all-cause mortality at 15–64 years decreased by -5.2 (95 per cent confidence interval -8.3 to -2.0, p = 0.002) per unit increase in GP supply. After additional adjustment for limiting long-term illness, the decrease was -3.3 (-6.7 to 0.1, p = 0.060). In the fully adjusted model, each unit increase in GP supply was associated with a decrease in hospital admission rates for acute conditions (-14.4, -21.4 to -7.4 per 100 000, p = 0.001) and chronic conditions (-10.6, -17.2 to -4.0, p = 0.002).
Conclusions In England, lower supply of GPs was associated with increased hospital utilization, but a strong univariate association with mortality might be explained by confounding.
Keywords: primary health care, social inequalities, access to medical care, hospital utilization
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