Influence of medical trainee sleep pattern (chronotype) on burn-out and satisfaction with work schedules: a multicentre observational study.

Background: Medical trainees' work schedule is designed to cover duties without consideration of differences in circadian rhythms during a 24-hour period (chronotype).

Objective: To explore chronotype variation among medical trainees and understand its association with burn-out and schedule satisfaction.

Methods: In a multicentre observational study, we conducted two surveys between 1 October 2018 and 1 April 2019.