(Abstracted from Lancet 2017;390:62–72)
The “weekend effect” refers to the phenomenon by which patients admitted to a hospital during the weekend have greater mortality than those admitted on weekdays. It is unknown what causes the weekend effect, nor is it clear how the excess risk is distributed across the 48 hours of weekend admissions.
Oxford Biomedical Research Centre (A.S.W., A.M., T.P.Q., N.J.F., P.W., M.L., N.S., J.F., J.D., D.H.W., D.W.C., T.E.A.P.); Nuffield Department of Medicine, University of Oxford (A.S.W., A.M., T.P.Q., N.J.F., M.L., N.S., J.F., D.H.W., D.W.C., T.E.A.P.); Oxford University Hospitals NHS Foundation Trust (N.J.F., P.W., N.S., D.W.C., T.E.A.P.); Nuffield Department of Clinical Neurosciences, University of Oxford (P.W.), John Radcliffe Hospital, Oxford; Brighton and Sussex Medical School, University of Sussex, Falmer (M.L.); Department of Computer Science, University of Oxford, Oxford (J.D.); and National Infection Service, Public Health England, Colindale, London (D.H.W., D.W.C.), United Kingdom