Sleep in the land of the midnight sun and polar night: The Tromsø study
While some diseases and human behaviors fluctuate consistently with season, the extent of seasonal variations in sleep, especially at high latitudes, is less consistent. We used data from a geographic region (69º North) with extremely large seasonal differences in daylight that had the 15 participan...
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Online Access: | https://hdl.handle.net/11250/2723897 https://doi.org/10.1080/07420528.2020.1845191 |
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ftfolkehelseins:oai:fhi.brage.unit.no:11250/2723897 2023-05-15T17:43:32+02:00 Sleep in the land of the midnight sun and polar night: The Tromsø study Sivertsen, Børge Friborg, Oddgeir Pallesen, Ståle Vedaa, Øystein Hopstock, Laila Arnesdatter 2020 application/pdf https://hdl.handle.net/11250/2723897 https://doi.org/10.1080/07420528.2020.1845191 eng eng https://www.tandfonline.com/doi/full/10.1080/07420528.2020.1845191 Chronobiology International. 2020, 1-10. urn:issn:0742-0528 https://hdl.handle.net/11250/2723897 https://doi.org/10.1080/07420528.2020.1845191 cristin:1858417 1-10 Chronobiology International Peer reviewed Journal article 2020 ftfolkehelseins https://doi.org/10.1080/07420528.2020.1845191 2022-11-18T06:51:07Z While some diseases and human behaviors fluctuate consistently with season, the extent of seasonal variations in sleep, especially at high latitudes, is less consistent. We used data from a geographic region (69º North) with extremely large seasonal differences in daylight that had the 15 participants blinded for the current study’s hypotheses. Data were derived from the Tromsø Study (2015–2016), an ongoing population-based study in Northern Norway comprising citizens aged 40 years and older (n = 21,083, participation = 64.7%). The sleep parameters included bedtime, rise time, sleep onset latency (SOL), and total sleep time. Insomnia was defined according to recent diagnostic criteria (International Classification of Sleep Disorders; ICSD-3). We found some evidence 20 of monthly or seasonal variation in sleep problems. Insomnia was most common during the winter months among men, but not women. No seasonal or monthly effects were observed for sleep duration. SOL was slightly longer during the winter months, but the differences were small and hardly of any clinical relevance. The small or non-existing seasonal variation in sleep and sleep difficulties indicate that extreme seasonal variation in daylight is of little influence on sleep status. 25 The city of Tromsø is a modern city with considerable level of artificial light, which may contribute to the observed rather stabile sleep patterns throughout the year. acceptedVersion Article in Journal/Newspaper Northern Norway polar night Tromsø midnight sun Norwegian Institute of Public Health Open Repository (Brage) Norway Tromsø Chronobiology International 38 3 334 342 |
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Open Polar |
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Norwegian Institute of Public Health Open Repository (Brage) |
op_collection_id |
ftfolkehelseins |
language |
English |
description |
While some diseases and human behaviors fluctuate consistently with season, the extent of seasonal variations in sleep, especially at high latitudes, is less consistent. We used data from a geographic region (69º North) with extremely large seasonal differences in daylight that had the 15 participants blinded for the current study’s hypotheses. Data were derived from the Tromsø Study (2015–2016), an ongoing population-based study in Northern Norway comprising citizens aged 40 years and older (n = 21,083, participation = 64.7%). The sleep parameters included bedtime, rise time, sleep onset latency (SOL), and total sleep time. Insomnia was defined according to recent diagnostic criteria (International Classification of Sleep Disorders; ICSD-3). We found some evidence 20 of monthly or seasonal variation in sleep problems. Insomnia was most common during the winter months among men, but not women. No seasonal or monthly effects were observed for sleep duration. SOL was slightly longer during the winter months, but the differences were small and hardly of any clinical relevance. The small or non-existing seasonal variation in sleep and sleep difficulties indicate that extreme seasonal variation in daylight is of little influence on sleep status. 25 The city of Tromsø is a modern city with considerable level of artificial light, which may contribute to the observed rather stabile sleep patterns throughout the year. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Sivertsen, Børge Friborg, Oddgeir Pallesen, Ståle Vedaa, Øystein Hopstock, Laila Arnesdatter |
spellingShingle |
Sivertsen, Børge Friborg, Oddgeir Pallesen, Ståle Vedaa, Øystein Hopstock, Laila Arnesdatter Sleep in the land of the midnight sun and polar night: The Tromsø study |
author_facet |
Sivertsen, Børge Friborg, Oddgeir Pallesen, Ståle Vedaa, Øystein Hopstock, Laila Arnesdatter |
author_sort |
Sivertsen, Børge |
title |
Sleep in the land of the midnight sun and polar night: The Tromsø study |
title_short |
Sleep in the land of the midnight sun and polar night: The Tromsø study |
title_full |
Sleep in the land of the midnight sun and polar night: The Tromsø study |
title_fullStr |
Sleep in the land of the midnight sun and polar night: The Tromsø study |
title_full_unstemmed |
Sleep in the land of the midnight sun and polar night: The Tromsø study |
title_sort |
sleep in the land of the midnight sun and polar night: the tromsø study |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2723897 https://doi.org/10.1080/07420528.2020.1845191 |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
Northern Norway polar night Tromsø midnight sun |
genre_facet |
Northern Norway polar night Tromsø midnight sun |
op_source |
1-10 Chronobiology International |
op_relation |
https://www.tandfonline.com/doi/full/10.1080/07420528.2020.1845191 Chronobiology International. 2020, 1-10. urn:issn:0742-0528 https://hdl.handle.net/11250/2723897 https://doi.org/10.1080/07420528.2020.1845191 cristin:1858417 |
op_doi |
https://doi.org/10.1080/07420528.2020.1845191 |
container_title |
Chronobiology International |
container_volume |
38 |
container_issue |
3 |
container_start_page |
334 |
op_container_end_page |
342 |
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1766145628545482752 |