Objective
The sleep problems of professional drivers, such as bus drivers and truck drivers could induce a severe economic and human loss. However, there are little data which revealed the sleep status of professional drivers in Korea. Therefore, we investigated the sleep status and the risk factors of daytime sleepiness in urban bus drivers.
Methods
Self-report questionnaires were given to 842 city bus drivers in Suwon, Korea, that included demographic characteristics, the Epworth Sleepiness Scale (ESS), Pittsburgh sleep quality index (PSQI), Insomnia Severity Index (ISI), and Berlin Questionnaire (BQ). The logistic regression analysis was conducted to investigate the risk factors of EDS among commercial bus drivers.
Results
The average of body mass index and total sleep time of 304 responding drivers were 24.7±3.2 kg/m2, 6.05±1.51 hours, respectively. Among them, 13.2% reported an Epworth sleepiness score >10. The majority of the responders reported suffering from poor sleep quality (68.4%) and 10.2% reported having a moderate to severe insomnia. The proportion of group with high risk for Obstructive sleep apnea (OSA) was 26.7%. In multivariate regression analysis, only three variables, including poor quality of sleep, insomnia, and high risk for OSA, were significantly associated with EDS.
Conclusions
This study has shown a high prevalence of excessive daytime sleepiness and insomnia, poor quality of sleep and high risk for OSA as risk factors of EDS among commercial bus drivers in Korea.
Keywords ; Excessive daytime sleepiness; Sleep quality; Insomnia; Obstructive sleep apnea; Bus driver
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