Associations of Excessive Sleepiness on Duty with Sleeping Hours and Number of Days of Overnight Work among Medical Residents in Japan

概要

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Despite long-standing concerns regarding the effects of working hours on the performance and health of medical residents, and the patients' safety, prior studies have not shown an association of excessive sleepiness with the number of sleeping hours and days of overnight work among medical residents. In August 2005, a questionnaire was mailed to 227 eligible participants at 16 teaching hospitals. The total number of sleeping hours in the last 30d was estimated from the average number of sleeping hours during regular days and during days with overnight work, and the number of days of overnight work. Multiple logistic regression analysis was used to adjust for potentially associated variables. A total of 149 men and 47 women participated in this study. The participation rate was 86.3%. Among the participants, 55 (28.1%) suffered from excessive sleepiness. Excessive sleepiness was associated with sleeping for less than 150h in the last 30d (corrected odds ratio [cOR]=1.57; 95% confidence interval [Cl], 1.02-2.16). The number of days of overnight work in the last 30 d showed no association with excessive sleepiness. Excessive sleepiness was also associated with smoking (cOR, 1.65; 95%Cl, 1.01-2.32). Medical residents who slept for less than 150h in the last 30d and smoked had a significantly higher risk of excessive sleepiness on duty.
社団法人日本産業衛生学会の論文