Figure 1.

Resident Coverage System. Panel A: Call coverage system before July 1, 2003. The on-call team took overnight call and left the next day when their work was finished. There was no consecutive work hour limit. Night float interns handled overnight admissions and cross-cover for the other teams. Night float residents supervised the night float interns. Panel B: Call coverage system after July 1, 2003. The on-call resident was on duty from 7:30 a.m. until 9:30 p.m., then signed out to a night float resident. The call resident returned at 7:30 a.m., and stayed until around 5 p.m. On-call interns worked from 7:30 a.m. on the call day until 1:30 p.m.on the postcall day, a total of 30 consecutive hours. Night float residents and interns worked from 9:00 p.m. until 8:00 a.m.