• Kimon Bekelis, Symeon Missios, and Todd A MacKenzie.
• Department of Neurosurgery, Jefferson Hospital for the Neurosciences, Philadel-phia, Pennsylvania.
• Neurosurgery. 2018 Mar 1; 82 (3): 329-334.

BackgroundThe association between long work hours and outcomes among attending surgeons remains an issue of debate.ObjectiveTo investigate whether operating emergently the night before an elective case was associated with inferior outcomes among attending neurosurgeons.MethodsWe executed a cohort study with unruptured cerebral aneurysm patients, who underwent endovascular coiling or surgical clipping from 2009 to 2013 and were registered in the Statewide Planning and Research Cooperative System database. We investigated the association of treatment by surgeons performing emergency procedures the night before with outcomes of elective cerebral aneurysm treatment using an instrumental variable analysis.ResultsOverall, 4700 patients underwent treatment for unruptured cerebral aneurysms. There was no difference in inpatient mortality (adjusted difference, -0.7%; 95% confidence interval [CI], -1.4% to 0.02%), discharge to a facility (adjusted difference, -0.1%; 95% CI, -1.2% to 1.2%), or length of stay (adjusted difference, -0.58; 95% CI, -1.66 to 0.50) between patients undergoing elective cerebral aneurysm treatment by surgeons who performed emergency procedures the night before, and those who did not.ConclusionUsing a comprehensive patient cohort in New York State for elective treatment of unruptured cerebral aneurysms, we did not identify an association of treatment by surgeons performing emergency procedures the night before, with mortality, discharge to a facility, or length of stay. Our study had 80% power to detect differences in mortality (our primary outcome), as small as 4.1%. The results of the present study do not support the argument for regulation of attending work hours.Copyright © 2017 by the Congress of Neurological Surgeons

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