• Kathleen M Finn, Andrew J Halvorsen, Saima Chaudhry, Sanjay Desai, Denise Dupras, Shalini Reddy, Sandhya Wahi-Gururaj, Lisa Willett, and Aimee K Zaas.
• Internal Medicine Residency Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA. Kfinn@partners.org.
• J Gen Intern Med. 2020 Nov 1; 35 (11): 3205-3209.

BackgroundThe learning and working environment for resident physicians shifted dramatically over the past two decades, with increased focus on work hours, resident wellness, and patient safety. Following two multi-center randomized trials comparing 16-h work limits for PGY-1 trainees to more flexible rules, the ACGME implemented new flexible work hours standards in 2017.ObjectiveWe sought to determine program directors' (PDs) support for the work hour changes and programmatic response.DesignIn 2017, US Internal Medicine PDs were surveyed about their degree of support for extension of PGY-1 work hour limits, whether they adopted the new maximum continuous work hours permitted, and reasons for their decisions.Key ResultsThe response rate was 70% (266/379). Fifty-seven percent of PDs (n = 151) somewhat/strongly support the new work hour rules for PGY-1 residents, while only 25% of programs (N = 66) introduced work periods greater than 16-h on any rotation. Higher rates of adopting change were seen in PDs who strongly/somewhat supported the change (56/151 [37%], P < 0.001), had tenure of 6+ years (33/93 [35%], P = 0.005), were of non-general internal medicine subspecialty (30/80 [38%], P = 0.003), at university-based programs (35/101 [35%], P = 0.009), and with increasing number of approved positions (< 38, 10/63 [16%]; 38-58, 13/69 [19%]; 59-100, 15/64 [23%]; > 100, 28/68 [41%], P = 0.005). Areas with the greatest influence for PDs not extending work hours were the 16-h rule working well (56%) and risk to PGY1 well-being (47%).ConclusionsAlthough the majority of PDs support the ACGME 2017 work hours rules, only 25% of programs made immediate changes to extend hours. These data reveal that complex, often competing, forces influence PDs' decisions to change trainee schedules.

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