from the abstract:
Risk-adjusted outcomes were calculated after adjusting for population factors, co-morbidities, and health system factors. Even after risk-adjustment, there exists large geographical variation in outcomes
Risk-adjusted outcomes were calculated after adjusting for population factors, co-morbidities, and health system factors. Even after risk-adjustment, there exists large geographical variation in outcomes
They are trying to measure differences in effectiveness for similar patients. GP gives a possible explanation for such a difference : the hospital probably gets good at the kinds of things it does a lot.