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Fatigue Increases the Risk of Injury From Sharp Devices in Medical Trainees: Results From a Case‐Crossover Study

David N. Fisman , MD, MPH, Anthony D. Harris , MD, MPH, Michael Rubin , MD, PhD, Gary S. Sorock , PhD and Murray A. Mittleman , MD, DrPH
Infection Control and Hospital Epidemiology
Vol. 28, No. 1 (January 2007), pp. 10-17
DOI: 10.1086/510569
Stable URL: http://www.jstor.org/stable/10.1086/510569
Page Count: 8
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Fatigue Increases the Risk of Injury From Sharp Devices in Medical Trainees: Results From a Case‐Crossover Study
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Abstract

Background.  Extreme fatigue in medical trainees likely compromises patient safety, but regulations that limit trainee work hours have been controversial. It is not known whether extreme fatigue compromises trainee safety in the healthcare workplace, but evidence of such a relationship would inform the current debate on trainee work practices. Our objective was to evaluate the relationship between fatigue and workplace injury risk among medical trainees and nontrainee healthcare workers. Design.  Case‐crossover study. Setting.  Five academic medical centers in the United States and Canada. Participants.  Healthcare workers reporting to employee healthcare clinics for evaluation of needlestick injuries and other injuries related to sharp instruments and devices (sharps injuries). Consenting workers completed a structured interview about work patterns, time at risk of injury, and frequency of fatigue. Results.  Of 350 interviewed subjects, 109 (31%) were medical trainees. Trainees worked more hours per week ( \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $P< .001$ \end{document} ) and slept less the night before an injury ( \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $P< .001$ \end{document} ) than did other healthcare workers. Fatigue increased injury risk in the study population as a whole (incidence rate ratio [IRR], 1.40 [95% confidence interval {CI}, 1.03‐1.90]), but this effect was limited to medical trainees (IRR, 2.94 [95% CI, 1.71‐5.07]) and was absent for other healthcare workers (IRR, 0.97 [95% CI, 0.66‐1.42]) ( \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $P=.001$ \end{document} ). Conclusions.  Long work hours and sleep deprivation among medical trainees result in fatigue, which is associated with a 3‐fold increase in the risk of sharps injury. Efforts to reduce trainee work hours may result in reduced risk of sharps‐related injuries among this group.

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