Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Sleep length as a function of morning shift-start time in irregular shift schedules for train drivers: self-rated health and individual differences.
Stockholm University, Faculty of Social Sciences, Stress Research Institute.
Stockholm University, Faculty of Social Sciences, Stress Research Institute.
Stockholm University, Faculty of Social Sciences, Stress Research Institute.
Show others and affiliations
2008 (English)In: Chronobiol Int, ISSN 1525-6073, Vol. 25, no 2, 349-58 p.Article in journal (Refereed) Published
Abstract [en]

Sleep length as a function of morning shift-start time in irregular shift schedules for train drivers: self-rated health and individual differences.

Ingre M, Kecklund G, Akerstedt T, Söderström M, Kecklund L.

Stress Research Institute, Stockholm University, Sweden. michael.ingre@stressforskning.su.se

Forty-six male train drivers (mean age = 46.5, SD = 5.1) were recruited to participate in a diary study for 14 consecutive days with questions about their sleep and working hours. A polynomial mixed-effect regression model showed a curvilinear relation ( p < .001) between shift-start time and sleep duration for shifts starting at 03:00-12:00 hand with a near linear increase for ones starting between 04:30 and 09:00 h of approximately 0.7 h for every 1 h the shift was delayed. The longest sleeps were estimated at approximately 8 h before shifts that started at approximately 10:00 h. The shortest sleeps were found for shifts that started before 04:30 h and were estimated at approximately 5 h. Individual differences were estimated with a random-effect standard deviation of 0.51 h, independent of shift start time ( p = .005). One-half of the between-subject variance was explained by subjective health. A one-step decrease in health was associated with a 26 min increase in sleep length. The results have practical implications for constructing shift schedules. Early morning shifts reduced sleep length substantially and should be mixed with later start hours to avoid the accumulation of sleep dept. Delaying the shift-start past 10:00 h had little effect on sleep opportunity; however, delaying shift-start to between 04:30 and 9:00 h had a strong impact on sleep length, with 70% of the extra time used for sleep, suggesting large positive effects for this range of shift-start times.

Place, publisher, year, edition, pages
2008. Vol. 25, no 2, 349-58 p.
Keyword [en]
Shift-start time, Sleep duration, Train drivers, Irregular shift schedules
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:su:diva-14169ISI: 000257613200016PubMedID: 18533329OAI: oai:DiVA.org:su-14169DiVA: diva2:180689
Note
Internt publ.nr P2659Available from: 2008-06-17 Created: 2008-06-17 Last updated: 2011-01-10Bibliographically approved

Open Access in DiVA

No full text

Other links

PubMedhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Retrieve&list_uids=18533329&dopt=Citation
By organisation
Stress Research Institute
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar

pubmed
urn-nbn

Altmetric score

pubmed
urn-nbn
Total: 65 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf