Impact of reduction in working hours for doctors in training on postgraduate medical education and patients' outcomes: systematic review.

Duty hours for resident physicians in the United States have been limited to 80 hours per week since 2003, but more stringent European regulations now limit trainees to 48 hours on duty each week. This systematic review concurred with another recent review in finding that the American regulations have not negatively impacted trainee or patient outcomes, but found that the impact of European regulations has not been adequately studied.