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In addition to long contractual hours during offshore weeks (14 × 12 h shifts), many personnel on North Sea oil/gas installations also work overtime, but little is known about the implications of overtime for sleep patterns offshore. In this study, the additive and interactive effects of overtime and age were analysed as predictors of sleep duration and sleep quality among offshore day-workers (N = 551), 54% of whom reported overtime. Sleep duration and quality were impaired among personnel who worked overtime, relative to those who worked only standard shifts; there was also an inverse dose-response relationship between overtime hours and sleep duration. Although the sleep measures were more favourable during shore leave than during offshore weeks, there was little evidence of compensatory sleep patterns. These findings are discussed with reference to known performance and health effects of short sleep hours; formal guidance on overtime work offshore is noted; and methodological issues are considered.

Original publication

DOI

10.1016/j.apergo.2014.12.004

Type

Journal article

Journal

Appl Ergon

Publication Date

05/2015

Volume

48

Pages

232 - 239

Keywords

Health and safety, Shift work, Work hours, Adult, Age Factors, Extraction and Processing Industry, Humans, Male, Middle Aged, North Sea, Personnel Staffing and Scheduling, Sleep, Sleep Deprivation, Work, Work Schedule Tolerance, Young Adult