Primary care supply and quality of care in England.

We investigated the relationship between primary care supply and quality of care in England. We analysed 35 process measures of quality of care covering 13 medical conditions using English Longitudinal Study of Aging data linked to area of residence indicators. Greater GP density had a statistically significant and positive association with quality of care, and distance to GP practice had a statistically significant and negative association. The effects were concentrated in indicators of care related to cardiovascular diseases and arthritis, and on specific indicators for diabetes, incontinence and hearing problems. The results suggest that better primary care supply can improve quality of care.