Excessive Daytime Sleepiness among the Japanese General Population

Abstract

BACKGROUND: Excessive daytime sleepiness is one of the principal symptoms of sleep disturbances, and is often associated with serious consequences including traffic and industrial accidents, decreased productivity, and interpersonal problems. However, there are few epidemiologic studies on excessive daytime sleepiness in a large scale sample targeting Japanese general population. METHODS: The survey was performed using a self-administered questionnaire in June 2000, targeting a population randomly selected from among 300 communities throughout Japan. This questionnaire included information about sleep habits and sleep problems. Excessive daytime sleepiness measured according to a question “Do you fall asleep when you must not sleep (for example when you are driving a car)?” RESULTS: A total of 28,714 subjects completed the questionnaire. The prevalence of excessive daytime sleepiness was 2.5% (male=2.8% and female=2.2%). Backward elimination analysis showed that the following were associated with excessive daytime sleepiness: male sex, young age, short sleep duration, subjective insufficient sleep, loss of deep sleep, disagreeable sensations in the legs, interruption of sleep by snoring or dyspnea, and feeling psychological stress. Interruption of sleep by snoring or dyspnea was the strongest associated factor (adjusted odds ratio=2.46, 95% confidence interval=1.76-3.43) of excessive daytime sleepiness. CONCLUSIONS: These results suggest that excessive daytime sleepiness in Japanese is associated with several sleep problems. These findings may be useful in attempts to prevent excessive daytime sleepiness in the general population of Japan.

Excessive Daytime Sleepiness, Sleep Hygiene, and Work Hours Among Medical Residents in India

“…The frequencies (see Table 9) were significantly different and suggest a 1.7 times greater risk of EDS for those subjects working more than 80 hours per week. An association between higher work hours in a week and EDS has been demonstrated in several studies from a number of different countries, including Canada (Hanlon et al, 2009), New Zealand (Gander et al, 2007), United States (Defoe et al, 2001;Gander et al 2007), Australia (Dorrian et al, 2006), Japan and others (Groeger, Zijlstra, & Dijk, 2004;Jagsi et al, 2008;Jewett, Dijk, Kronauer, & Dinges, 1999;Kaneita et al, 2005;Klerman & Dijk, 2005;Liu, Uchiyama, Kim, et al, 2000;Ohida et al, 2004;Skeff, Ezeji-Okoye, Pompei, & Rockson, 2004;Steinbrook, 2002).…”

“…The effect of inadequate sleep on EDS is well documented in resident physicians and the general population, (Dorrian et al, 2006;Groeger et al, 2004;Jewett et al, 1999;Kaneita et al, 2005;Klerman & Dijk, 2005;Liu, Uchiyama, Kim, et al, 2000;Ohida et al, 2004;Takegami, Sokejima, Yamazaki, Nakayama, & Fukuhara, 2005), but this is the first study of its kind available from India (Gupta, Pati, & Levi, 1997;Kannan, Malhotra, Bajaj, Pershad, & Chari, 1996). Suggested explanations for an association between sleepiness and work hours includes stress related to work, burnout, inadequate sleep hours, sleep deprivation and sleep debt and other work-related characteristics like floating shift work.…”

Síndrome das apnéias-hipopnéias obstrutivas do sono: associação com gênero e obesidade e fatores relacionados à sonolência

“…Factors such as fragmented sleep due to respiratory events or dyspnea have previously been related to EDS. (18,19) Among the consequences of OSAHS-related EDS is the greater frequency of traffic accidents due to drivers falling asleep at the wheel. (11) Of the patients studied, 15.3% reported having accidents the level of systemic arterial pressure was associated with obesity and with OSAHS severity.…”

“…Statistically signifiof hours of sleep. Based on the AHI, OSAHS severity was classified as mild (<15), moderate (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) or severe (>30). (14) Data were stored and analyzed using the program Statistical Package for Social Sciences, version 14.0 (SPSS Inc, Chicago, IL, USA).…”

Sleep quality and sleepiness characteristics in first trimester expectant mothers

“…Also, surveys of the general population and the employed have reported that those who have higher stress levels have shorter sleep time (Kim et al, 2000;Nakata et al, 2004), and stronger daytime sleepiness (Kaneita et al, 2005). Studies have suggested that expectant mothers who have poor sleep may have higher stress levels.…”