Large varation in post-surgery mortality

New study in the New England Journal of Medicine pointing out large variation in post-surgical mortality (3.5% in low mortality hospitals to nearly double, 6.9% in high mortality ones; risk adjusted). Interestingly, the high and low mortality hospitasl don't differ so much in terms of complications, it is just that there are big differences in likelihood of dying across hospital given a complication.

This points out tremendous quality differences and problems with quality in the US system.