(Abstracted from Am J Obstet Gynecol 2018;219:176.e1–176.e9)
It has been hypothesized that yearly turnover and hospitals' overall transition from more experienced to less experienced trainees from July to September may be responsible for an increase in medical errors and poorer outcomes, a phenomenon known as the July effect. A large number of studies have investigated the July effect in both medical and surgical fields, but results have been largely mixed.
Johns Hopkins School of Medicine (S.V., A.M.); Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health (S.H.); and Department of Medicine (S.H.) and Kelly Gynecologic Oncology Service, Department of Gynecology and Obstetrics (R.L.S., S.L.W., A.N.F.), Johns Hopkins Hospital, Baltimore, MD