Momoko Kayaba1,2, Taeko Sasai-Sakuma1,2,3, Yoshikazu Takaesu4,5, Yuichi Inoue6,7. 1. Department of Somnology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan. 2. Japan Somnology Center, Institute of Neuropsychiatry, 5-10-10, Yoyogi, Shibuya-ku, Tokyo, 151-0053, Japan. 3. Department of Clinical Laboratory Science, Faculty of Medical Technology, Teikyo University, Kaga 2-11-1, Itabashi-ku, Tokyo, 173-8605, Japan. 4. Department of Neuropsychiatry, Kyorin University School of Medicine, Shinkawa 6-20-2, Mitaka-shi, Tokyo, 181-8611, Japan. 5. Department of Neuropsychiatry, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa, 903-0215, Japan. 6. Department of Somnology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan. inoue@somnology.com. 7. Japan Somnology Center, Institute of Neuropsychiatry, 5-10-10, Yoyogi, Shibuya-ku, Tokyo, 151-0053, Japan. inoue@somnology.com.
Abstract
BACKGROUND: The situation of work productivity loss due to sleep disorders/problems among workers in industrialized societies remains unclear. The purpose of this study was to clarify the prevalence of insomnia symptoms and actual situation of work productivity by job type (white-collars/blue-collars) among construction/civil engineering workers in Japan and evaluate the association between insomnia symptoms and work productivity adjusting for sleep duration and sociodemographic, work-related, and health-related variables. METHODS: This cross-sectional study included 17,828 construction/civil engineering workers (15,837 males and 1991 females) aged 40 to 74 years in Japan. The questionnaire consisted of socio-demographic characteristics, information on work productivity (work performance and absence), respective insomnia symptoms (difficulty initiating sleep; DIS, difficulty maintaining sleep; DMS, and early morning awakening; EMA), bedtime schedule, work-related factors (job type, working hours), and perceived health condition. To identify the associated factors of work productivity, the logistic regression analyses were conducted. RESULTS: The percentages of workers who reported to be experiencing DIS, DMS, and EMA were 7.9, 16.3, and 13.1%, respectively. Poor work performance was associated with every insomnia symptom in both the blue-collar and white-collar workers. Meanwhile, absence was associated with DIS in blue-collar workers and both DIS and DMS in white-collar workers; however, not with EMA in both the groups. In blue-collar workers, engagement in shift work was associated with poor work performance. CONCLUSIONS: The present study revealed the association between insomnia symptoms and work productivity, suggesting the necessity of early prevention of insomnia among both blue-collar and white-collar workers.
BACKGROUND: The situation of work productivity loss due to sleep disorders/problems among workers in industrialized societies remains unclear. The purpose of this study was to clarify the prevalence of insomnia symptoms and actual situation of work productivity by job type (white-collars/blue-collars) among construction/civil engineering workers in Japan and evaluate the association between insomnia symptoms and work productivity adjusting for sleep duration and sociodemographic, work-related, and health-related variables. METHODS: This cross-sectional study included 17,828 construction/civil engineering workers (15,837 males and 1991 females) aged 40 to 74 years in Japan. The questionnaire consisted of socio-demographic characteristics, information on work productivity (work performance and absence), respective insomnia symptoms (difficulty initiating sleep; DIS, difficulty maintaining sleep; DMS, and early morning awakening; EMA), bedtime schedule, work-related factors (job type, working hours), and perceived health condition. To identify the associated factors of work productivity, the logistic regression analyses were conducted. RESULTS: The percentages of workers who reported to be experiencing DIS, DMS, and EMA were 7.9, 16.3, and 13.1%, respectively. Poor work performance was associated with every insomnia symptom in both the blue-collar and white-collar workers. Meanwhile, absence was associated with DIS in blue-collar workers and both DIS and DMS in white-collar workers; however, not with EMA in both the groups. In blue-collar workers, engagement in shift work was associated with poor work performance. CONCLUSIONS: The present study revealed the association between insomnia symptoms and work productivity, suggesting the necessity of early prevention of insomnia among both blue-collar and white-collar workers.
Entities:
Keywords:
Absenteeism; Blue-collar worker; Insomnia; Shift work; Work performance; Work productivity
Authors: Ronald C Kessler; Patricia A Berglund; Catherine Coulouvrat; Goeran Hajak; Thomas Roth; Victoria Shahly; Alicia C Shillington; Judith J Stephenson; James K Walsh Journal: Sleep Date: 2011-09-01 Impact factor: 5.849
Authors: Leslie M Swanson; J Todd Arnedt; Mark R Rosekind; Gregory Belenky; Thomas J Balkin; Christopher Drake Journal: J Sleep Res Date: 2010-09-30 Impact factor: 3.981