same positive effect on equity was shown in the case of stroke mortality. States with high
income inequality and relatively high primary care physician to population ratios had
lower stroke mortality whereas those relatively deprived of primary care physicians had an
increased stroke mortality. States with low income inequality also showed the same effect
of high and low primary care resources: more primary care physicians associated with lower
mortality and fewer primary care physicians associated with higher mortality.
Based on data in: Shi L, Starfield B. Primary care, income
inequality, and self-rated health in the United States: a mixed-level analysis. Int J
Health Serv 2000; 30(3):541-555.