Mortality in a teaching hospital during junior doctor changeover: a regional and national comparison.

Concerns about whether the junior doctor changeover in the UK is associated with an increased risk of death have been reawakened by a retrospective study (Jen et al, 2009). Examination of overall mortality data has consistently failed to demonstrate any increase in mortality during the changeover. However, regional and national trends may mask this increase, so a study was undertaken to compare mortality in a busy London teaching hospital with regional and national trends. No evidence of an increase in mortality in August was found for any of the time periods examined, even after comparison with regional and national trends. The authors conclude that examination of overall mortality data is a blunt and impractical instrument for settling the question of whether an increase in morbidity and mortality occurs. Preventable morbidity and mortality should be audited.