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. Author manuscript; available in PMC: 2019 Sep 7.
Published in final edited form as: N Engl J Med. 2019 Mar 7;380(10):915–923. doi: 10.1056/NEJMoa1810641

Figure 3. Percent of Interns Sleeping According to Time of Day.

Figure 3.

The sleep duration of interns in flexible programs was more than 2 hours shorter on the second day of the extended overnight shift than that during the regular night shifts of interns in standard programs (Panel A). Interns in flexible programs slept longer before extended overnight shifts (Panel B), before day shifts (Panel C), and before days off (Panel D) than interns in standard programs.