Abstract
To better understand sleep quality and sleepiness problems offshore, we examined courses of sleep quality and sleepiness in full 2-weeks on/2-weeks off offshore day shift rotations by comparing pre-offshore (1 week), offshore (2 weeks) and post-offshore (1 week) work periods. A longitudinal observational study was conducted among N=42 offshore workers. Sleep quality was measured subjectively with two daily questions and objectively with actigraphy, measuring: time in bed (TIB), total sleep time (TST), sleep latency (SL) and sleep efficiency percentage (SE%). Sleepiness was measured twice a day (morning and evening) with the Karolinska Sleepiness Scale. Changes in sleep and sleepiness parameters during the pre/post and offshore work periods were investigated using (generalized) linear mixed models. In the pre-offshore work period, courses of SE% significantly decreased (p=.038). During offshore work periods, the courses of evening sleepiness scores significantly increased (p<.001) and significantly decreased during post-offshore work periods (p=.004). During offshore work periods, TIB (p<.001) and TST (p<.001) were significantly shorter, SE% was significantly higher (p=.002), perceived sleep quality was significantly lower (p<.001) and level of rest after wake was significantly worse (p<.001) than during the pre- and post-offshore work periods. Morning sleepiness was significantly higher during offshore work periods (p=.015) and evening sleepiness was significantly higher in the post-offshore work period (p=.005) compared to the other periods. No significant changes in SL were observed. Courses of sleep quality and sleepiness parameters significantly changed during full 2-weeks on/2-weeks off offshore day shift rotation periods. These changes should be considered in offshore fatigue risk management programmes.
| Original language | English |
|---|---|
| Pages (from-to) | 759-772 |
| Number of pages | 14 |
| Journal | Chronobiology International |
| Volume | 35 |
| Issue number | 6: Special Issue |
| Early online date | 16 May 2018 |
| DOIs | |
| Publication status | Published - Jun 2018 |
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Bibliographical note
Volume 35 Issue 6: Special Issue: 23rd International Symposium on Shiftwork and Working Time: Toward a Global ConsensusKeywords
- Actigraphy
- Fatigue
- Fatigue Risk management
- Occupational Health
- Occupational Safety
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Examining courses of sleep quality and sleepiness in full 2 weeks on/2 weeks off offshore day shift rotations. / Riethmeister, V.; Bültmann, U.; De Boer, M. R.; Gordijn, M.; Brouwer, S.
In: Chronobiology International, Vol. 35, No. 6: Special Issue, 06.2018, p. 759-772.Research output: Contribution to Journal › Article › Academic › peer-review
TY - JOUR
T1 - Examining courses of sleep quality and sleepiness in full 2 weeks on/2 weeks off offshore day shift rotations
AU - Riethmeister, V.
AU - Bültmann, U.
AU - De Boer, M. R.
AU - Gordijn, M.
AU - Brouwer, S.
N1 - Volume 35 Issue 6: Special Issue: 23rd International Symposium on Shiftwork and Working Time: Toward a Global Consensus
PY - 2018/6
Y1 - 2018/6
N2 - To better understand sleep quality and sleepiness problems offshore, we examined courses of sleep quality and sleepiness in full 2-weeks on/2-weeks off offshore day shift rotations by comparing pre-offshore (1 week), offshore (2 weeks) and post-offshore (1 week) work periods. A longitudinal observational study was conducted among N=42 offshore workers. Sleep quality was measured subjectively with two daily questions and objectively with actigraphy, measuring: time in bed (TIB), total sleep time (TST), sleep latency (SL) and sleep efficiency percentage (SE%). Sleepiness was measured twice a day (morning and evening) with the Karolinska Sleepiness Scale. Changes in sleep and sleepiness parameters during the pre/post and offshore work periods were investigated using (generalized) linear mixed models. In the pre-offshore work period, courses of SE% significantly decreased (p=.038). During offshore work periods, the courses of evening sleepiness scores significantly increased (p<.001) and significantly decreased during post-offshore work periods (p=.004). During offshore work periods, TIB (p<.001) and TST (p<.001) were significantly shorter, SE% was significantly higher (p=.002), perceived sleep quality was significantly lower (p<.001) and level of rest after wake was significantly worse (p<.001) than during the pre- and post-offshore work periods. Morning sleepiness was significantly higher during offshore work periods (p=.015) and evening sleepiness was significantly higher in the post-offshore work period (p=.005) compared to the other periods. No significant changes in SL were observed. Courses of sleep quality and sleepiness parameters significantly changed during full 2-weeks on/2-weeks off offshore day shift rotation periods. These changes should be considered in offshore fatigue risk management programmes.
AB - To better understand sleep quality and sleepiness problems offshore, we examined courses of sleep quality and sleepiness in full 2-weeks on/2-weeks off offshore day shift rotations by comparing pre-offshore (1 week), offshore (2 weeks) and post-offshore (1 week) work periods. A longitudinal observational study was conducted among N=42 offshore workers. Sleep quality was measured subjectively with two daily questions and objectively with actigraphy, measuring: time in bed (TIB), total sleep time (TST), sleep latency (SL) and sleep efficiency percentage (SE%). Sleepiness was measured twice a day (morning and evening) with the Karolinska Sleepiness Scale. Changes in sleep and sleepiness parameters during the pre/post and offshore work periods were investigated using (generalized) linear mixed models. In the pre-offshore work period, courses of SE% significantly decreased (p=.038). During offshore work periods, the courses of evening sleepiness scores significantly increased (p<.001) and significantly decreased during post-offshore work periods (p=.004). During offshore work periods, TIB (p<.001) and TST (p<.001) were significantly shorter, SE% was significantly higher (p=.002), perceived sleep quality was significantly lower (p<.001) and level of rest after wake was significantly worse (p<.001) than during the pre- and post-offshore work periods. Morning sleepiness was significantly higher during offshore work periods (p=.015) and evening sleepiness was significantly higher in the post-offshore work period (p=.005) compared to the other periods. No significant changes in SL were observed. Courses of sleep quality and sleepiness parameters significantly changed during full 2-weeks on/2-weeks off offshore day shift rotation periods. These changes should be considered in offshore fatigue risk management programmes.
KW - Actigraphy
KW - Fatigue
KW - Fatigue Risk management
KW - Occupational Health
KW - Occupational Safety
UR - http://www.scopus.com/inward/record.url?scp=85047116968&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047116968&partnerID=8YFLogxK
U2 - 10.1080/07420528.2018.1466794
DO - 10.1080/07420528.2018.1466794
M3 - Article
VL - 35
SP - 759
EP - 772
JO - Chronobiology International
JF - Chronobiology International
SN - 0742-0528
IS - 6: Special Issue
ER -