Abstract
Objectives: The purpose of this study was to investigate the accumulation of fatigue over a two-week offshore period. In particular, the effects of (1) time-of-day and days-on-shift as well as (2) acute and chronic sleep loss on the rate at which fatigue accumulates were investigated. Methods: 42 day-shift offshore workers were examined. Fatigue was measured using pre- and post-shift scores on the Karolinska Sleepiness Scale (KSS). Total sleep time was measured using actigraphy (Motionwatch8, Camntech). Data was analyzed using a linear mixed model analyses. Results: Average sleep loss per night was 92 min (95%CI: 89.6–94.0; p <.001). Mean cumulative sleep loss across the study was 21:20hrs (SD = 08:10hrs) over the 14 days. Chronic sleep loss was significantly related to a modest increase in sleepiness (KSS) across the shift (95%CI: 0.01–0.17; p =.020) and in post-shift scores (95%CI:.07–0.19; p <.001). Time-of-day (95%CI: 0.63 to −0.01; p =.042) and days-on-shift (95%CI: 0.03–0.08; p <.001) as well as their interaction (95%CI: 0.08 to −0.00; p =.027) influenced the rate at which fatigue accumulated over a two-week offshore period. Conclusions: Pre- and post-shift fatigue accumulate in different ways over the two-week offshore period. The accumulation of post-shift fatigue scores was positively related to successive days-on-shift and chronic sleep loss. Our results suggest that prolonging offshore periods will likely result in elevated fatigue risk. Accumulating fatigue and sleep loss over two-week offshore periods should be considered in fatigue risk management plans and systems.
| Language | English |
|---|---|
| Pages | 157-163 |
| Number of pages | 7 |
| Journal | Applied Ergonomics |
| Volume | 78 |
| DOIs | |
| Publication status | Published - 1 Jul 2019 |
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Keywords
- Fatigue risk management
- Occupational health
- Occupational safety
- Sleep
- Sleepiness
Cite this
}
Time-of-day and days-on-shift predict increased fatigue over two-week offshore day-shifts. / Riethmeister, V.; Matthews, R. W.; Dawson, D.; de Boer, M. R.; Brouwer, S.; Bültmann, U.
In: Applied Ergonomics, Vol. 78, 01.07.2019, p. 157-163.Research output: Contribution to Journal › Article › Academic › peer-review
TY - JOUR
T1 - Time-of-day and days-on-shift predict increased fatigue over two-week offshore day-shifts
AU - Riethmeister, V.
AU - Matthews, R. W.
AU - Dawson, D.
AU - de Boer, M. R.
AU - Brouwer, S.
AU - Bültmann, U.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Objectives: The purpose of this study was to investigate the accumulation of fatigue over a two-week offshore period. In particular, the effects of (1) time-of-day and days-on-shift as well as (2) acute and chronic sleep loss on the rate at which fatigue accumulates were investigated. Methods: 42 day-shift offshore workers were examined. Fatigue was measured using pre- and post-shift scores on the Karolinska Sleepiness Scale (KSS). Total sleep time was measured using actigraphy (Motionwatch8, Camntech). Data was analyzed using a linear mixed model analyses. Results: Average sleep loss per night was 92 min (95%CI: 89.6–94.0; p <.001). Mean cumulative sleep loss across the study was 21:20hrs (SD = 08:10hrs) over the 14 days. Chronic sleep loss was significantly related to a modest increase in sleepiness (KSS) across the shift (95%CI: 0.01–0.17; p =.020) and in post-shift scores (95%CI:.07–0.19; p <.001). Time-of-day (95%CI: 0.63 to −0.01; p =.042) and days-on-shift (95%CI: 0.03–0.08; p <.001) as well as their interaction (95%CI: 0.08 to −0.00; p =.027) influenced the rate at which fatigue accumulated over a two-week offshore period. Conclusions: Pre- and post-shift fatigue accumulate in different ways over the two-week offshore period. The accumulation of post-shift fatigue scores was positively related to successive days-on-shift and chronic sleep loss. Our results suggest that prolonging offshore periods will likely result in elevated fatigue risk. Accumulating fatigue and sleep loss over two-week offshore periods should be considered in fatigue risk management plans and systems.
AB - Objectives: The purpose of this study was to investigate the accumulation of fatigue over a two-week offshore period. In particular, the effects of (1) time-of-day and days-on-shift as well as (2) acute and chronic sleep loss on the rate at which fatigue accumulates were investigated. Methods: 42 day-shift offshore workers were examined. Fatigue was measured using pre- and post-shift scores on the Karolinska Sleepiness Scale (KSS). Total sleep time was measured using actigraphy (Motionwatch8, Camntech). Data was analyzed using a linear mixed model analyses. Results: Average sleep loss per night was 92 min (95%CI: 89.6–94.0; p <.001). Mean cumulative sleep loss across the study was 21:20hrs (SD = 08:10hrs) over the 14 days. Chronic sleep loss was significantly related to a modest increase in sleepiness (KSS) across the shift (95%CI: 0.01–0.17; p =.020) and in post-shift scores (95%CI:.07–0.19; p <.001). Time-of-day (95%CI: 0.63 to −0.01; p =.042) and days-on-shift (95%CI: 0.03–0.08; p <.001) as well as their interaction (95%CI: 0.08 to −0.00; p =.027) influenced the rate at which fatigue accumulated over a two-week offshore period. Conclusions: Pre- and post-shift fatigue accumulate in different ways over the two-week offshore period. The accumulation of post-shift fatigue scores was positively related to successive days-on-shift and chronic sleep loss. Our results suggest that prolonging offshore periods will likely result in elevated fatigue risk. Accumulating fatigue and sleep loss over two-week offshore periods should be considered in fatigue risk management plans and systems.
KW - Fatigue risk management
KW - Occupational health
KW - Occupational safety
KW - Sleep
KW - Sleepiness
UR - http://www.scopus.com/inward/record.url?scp=85063108157&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063108157&partnerID=8YFLogxK
U2 - 10.1016/j.apergo.2019.02.010
DO - 10.1016/j.apergo.2019.02.010
M3 - Article
VL - 78
SP - 157
EP - 163
JO - Applied Ergonomics
T2 - Applied Ergonomics
JF - Applied Ergonomics
SN - 0003-6870
ER -