Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women

Robert J Brychta, Nanna Ýr Arnardóttir, Erlingur Jóhannsson, E. C. Wright, Gudny Eiriksdottir, V Gudnason, C. R. Marinac, M. Davis, A Koster, P. Caserotti, Thórarinn Sveinsson, T. Harris, Kong Y Chen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Study Objectives: To identify cross-sectional and seasonal patterns of sleep and physical activity (PA) in community-dwelling, older Icelandic adults using accelerometers. Methods: A seven-day free-living protocol of 244 (110 female) adults aged 79.7 +/- 4.9 years was conducted as part of a larger population-based longitudinal observational-cohort study in the greater Reykjavik area of Iceland. A subpopulation (n = 72) repeated the 7-day measurement during seasonal periods with greater (13.4 +/- 1.4 h) and lesser (7.7 +/- 1.8 h) daylight. Results: Cross-sectional analyses using multiple linear regression models revealed that day length was a significant independent predictor of sleep duration, mid-sleep, and rise time (all p < 0.05). However, the actual within-individual differences in sleep patterns of the repeaters were rather subtle between periods of longer and shorter day-lengths. Compared to women, men had a shorter sleep duration (462 +/- 80 vs. 487 +/- 68 minutes, p = 0.008), earlier rise time, and a greater number of awakenings per night (46.5 +/- 18.3 vs. 40.2 +/- 15.7, p = 0.007), but sleep efficiency and onset latency were similar between the two sexes. Daily PA was also similar between men and women and between periods of longer and shorter day-lengths. BMI, age, gender, and overall PA all contributed to the variations in sleep parameters using multiple regression analysis. Conclusions: The sleep and PA characteristics of this unique population revealed some gender differences, but there was limited variation in response to significant daylight changes which may be due to long-term adaptation.
OriginalsprogEngelsk
TidsskriftThe Journal of Clinical Sleep Medicine
Vol/bind12
Udgave nummer2
Sider (fra-til)203-213
ISSN1550-9389
DOI
StatusUdgivet - 2016

Fingeraftryk

Exercise
Linear Models
Independent Living
Iceland
Population Characteristics
Individuality
Cohort Studies
Cross-Sectional Studies
Regression Analysis
Population

Citer dette

Brychta, R. J., Arnardóttir, N. Ý., Jóhannsson, E., Wright, E. C., Eiriksdottir, G., Gudnason, V., ... Chen, K. Y. (2016). Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women. The Journal of Clinical Sleep Medicine, 12(2), 203-213. https://doi.org/10.5664/jcsm.5486
Brychta, Robert J ; Arnardóttir, Nanna Ýr ; Jóhannsson, Erlingur ; Wright, E. C. ; Eiriksdottir, Gudny ; Gudnason, V ; Marinac, C. R. ; Davis, M. ; Koster, A ; Caserotti, P. ; Sveinsson, Thórarinn ; Harris, T. ; Chen, Kong Y. / Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women. I: The Journal of Clinical Sleep Medicine. 2016 ; Bind 12, Nr. 2. s. 203-213.
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abstract = "Study Objectives: To identify cross-sectional and seasonal patterns of sleep and physical activity (PA) in community-dwelling, older Icelandic adults using accelerometers. Methods: A seven-day free-living protocol of 244 (110 female) adults aged 79.7 +/- 4.9 years was conducted as part of a larger population-based longitudinal observational-cohort study in the greater Reykjavik area of Iceland. A subpopulation (n = 72) repeated the 7-day measurement during seasonal periods with greater (13.4 +/- 1.4 h) and lesser (7.7 +/- 1.8 h) daylight. Results: Cross-sectional analyses using multiple linear regression models revealed that day length was a significant independent predictor of sleep duration, mid-sleep, and rise time (all p < 0.05). However, the actual within-individual differences in sleep patterns of the repeaters were rather subtle between periods of longer and shorter day-lengths. Compared to women, men had a shorter sleep duration (462 +/- 80 vs. 487 +/- 68 minutes, p = 0.008), earlier rise time, and a greater number of awakenings per night (46.5 +/- 18.3 vs. 40.2 +/- 15.7, p = 0.007), but sleep efficiency and onset latency were similar between the two sexes. Daily PA was also similar between men and women and between periods of longer and shorter day-lengths. BMI, age, gender, and overall PA all contributed to the variations in sleep parameters using multiple regression analysis. Conclusions: The sleep and PA characteristics of this unique population revealed some gender differences, but there was limited variation in response to significant daylight changes which may be due to long-term adaptation.",
keywords = "aging seasonal total sleep time physical activity accelerometer gene/environment susceptibility-reykjavik light exposure osteoporotic fractures monochromatic light seasonal-variations elderly persons united-states blue-light poor sleep age Neurosciences & Neurology",
author = "Brychta, {Robert J} and Arnard{\'o}ttir, {Nanna {\'Y}r} and Erlingur J{\'o}hannsson and Wright, {E. C.} and Gudny Eiriksdottir and V Gudnason and Marinac, {C. R.} and M. Davis and A Koster and P. Caserotti and Th{\'o}rarinn Sveinsson and T. Harris and Chen, {Kong Y}",
note = "ISI Document Delivery No.: DJ3XB Times Cited: 0 Cited Reference Count: 44 Brychta, Robert J. Arnardottir, Nanna Yr Johannsson, Erlingur Wright, Elizabeth C. Eiriksdottir, Gudny Gudnason, Vilmundur Marinac, Catherine R. Davis, Megan Koster, Annemarie Caserotti, Paolo Sveinsson, Thorarinn Harris, Tamara Chen, Kong Y. Chen, Kong/0000-0002-0306-1904 National Institutes of Health (NIH) [N01-AG-1-2100]; National Institute on Aging (NIA) Intramural Research Program; Hjartavernd (Icelandic Heart Association); Althingi (the Icelandic Parliament); National Institutes of Health Intramural Research Program [Z01 DK071013, Z01 DK071014] This was not an industry supported study. This study was funded by National Institutes of Health (NIH) contract N01-AG-1-2100, the National Institute on Aging (NIA) Intramural Research Program, Hjartavernd (the Icelandic Heart Association), and the Althingi (the Icelandic Parliament). This study was also supported by National Institutes of Health Intramural Research Program contract number: Z01 DK071013 and Z01 DK071014 for R.J.B. and K.Y.C. The authors have indicated no financial conflicts of interest. 0 4 8 Amer acad sleep medicine Westchester 1550-9397",
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Brychta, RJ, Arnardóttir, NÝ, Jóhannsson, E, Wright, EC, Eiriksdottir, G, Gudnason, V, Marinac, CR, Davis, M, Koster, A, Caserotti, P, Sveinsson, T, Harris, T & Chen, KY 2016, 'Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women', The Journal of Clinical Sleep Medicine, bind 12, nr. 2, s. 203-213. https://doi.org/10.5664/jcsm.5486

Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women. / Brychta, Robert J; Arnardóttir, Nanna Ýr; Jóhannsson, Erlingur; Wright, E. C.; Eiriksdottir, Gudny; Gudnason, V; Marinac, C. R.; Davis, M.; Koster, A; Caserotti, P.; Sveinsson, Thórarinn; Harris, T.; Chen, Kong Y.

I: The Journal of Clinical Sleep Medicine, Bind 12, Nr. 2, 2016, s. 203-213.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women

AU - Brychta, Robert J

AU - Arnardóttir, Nanna Ýr

AU - Jóhannsson, Erlingur

AU - Wright, E. C.

AU - Eiriksdottir, Gudny

AU - Gudnason, V

AU - Marinac, C. R.

AU - Davis, M.

AU - Koster, A

AU - Caserotti, P.

AU - Sveinsson, Thórarinn

AU - Harris, T.

AU - Chen, Kong Y

N1 - ISI Document Delivery No.: DJ3XB Times Cited: 0 Cited Reference Count: 44 Brychta, Robert J. Arnardottir, Nanna Yr Johannsson, Erlingur Wright, Elizabeth C. Eiriksdottir, Gudny Gudnason, Vilmundur Marinac, Catherine R. Davis, Megan Koster, Annemarie Caserotti, Paolo Sveinsson, Thorarinn Harris, Tamara Chen, Kong Y. Chen, Kong/0000-0002-0306-1904 National Institutes of Health (NIH) [N01-AG-1-2100]; National Institute on Aging (NIA) Intramural Research Program; Hjartavernd (Icelandic Heart Association); Althingi (the Icelandic Parliament); National Institutes of Health Intramural Research Program [Z01 DK071013, Z01 DK071014] This was not an industry supported study. This study was funded by National Institutes of Health (NIH) contract N01-AG-1-2100, the National Institute on Aging (NIA) Intramural Research Program, Hjartavernd (the Icelandic Heart Association), and the Althingi (the Icelandic Parliament). This study was also supported by National Institutes of Health Intramural Research Program contract number: Z01 DK071013 and Z01 DK071014 for R.J.B. and K.Y.C. The authors have indicated no financial conflicts of interest. 0 4 8 Amer acad sleep medicine Westchester 1550-9397

PY - 2016

Y1 - 2016

N2 - Study Objectives: To identify cross-sectional and seasonal patterns of sleep and physical activity (PA) in community-dwelling, older Icelandic adults using accelerometers. Methods: A seven-day free-living protocol of 244 (110 female) adults aged 79.7 +/- 4.9 years was conducted as part of a larger population-based longitudinal observational-cohort study in the greater Reykjavik area of Iceland. A subpopulation (n = 72) repeated the 7-day measurement during seasonal periods with greater (13.4 +/- 1.4 h) and lesser (7.7 +/- 1.8 h) daylight. Results: Cross-sectional analyses using multiple linear regression models revealed that day length was a significant independent predictor of sleep duration, mid-sleep, and rise time (all p < 0.05). However, the actual within-individual differences in sleep patterns of the repeaters were rather subtle between periods of longer and shorter day-lengths. Compared to women, men had a shorter sleep duration (462 +/- 80 vs. 487 +/- 68 minutes, p = 0.008), earlier rise time, and a greater number of awakenings per night (46.5 +/- 18.3 vs. 40.2 +/- 15.7, p = 0.007), but sleep efficiency and onset latency were similar between the two sexes. Daily PA was also similar between men and women and between periods of longer and shorter day-lengths. BMI, age, gender, and overall PA all contributed to the variations in sleep parameters using multiple regression analysis. Conclusions: The sleep and PA characteristics of this unique population revealed some gender differences, but there was limited variation in response to significant daylight changes which may be due to long-term adaptation.

AB - Study Objectives: To identify cross-sectional and seasonal patterns of sleep and physical activity (PA) in community-dwelling, older Icelandic adults using accelerometers. Methods: A seven-day free-living protocol of 244 (110 female) adults aged 79.7 +/- 4.9 years was conducted as part of a larger population-based longitudinal observational-cohort study in the greater Reykjavik area of Iceland. A subpopulation (n = 72) repeated the 7-day measurement during seasonal periods with greater (13.4 +/- 1.4 h) and lesser (7.7 +/- 1.8 h) daylight. Results: Cross-sectional analyses using multiple linear regression models revealed that day length was a significant independent predictor of sleep duration, mid-sleep, and rise time (all p < 0.05). However, the actual within-individual differences in sleep patterns of the repeaters were rather subtle between periods of longer and shorter day-lengths. Compared to women, men had a shorter sleep duration (462 +/- 80 vs. 487 +/- 68 minutes, p = 0.008), earlier rise time, and a greater number of awakenings per night (46.5 +/- 18.3 vs. 40.2 +/- 15.7, p = 0.007), but sleep efficiency and onset latency were similar between the two sexes. Daily PA was also similar between men and women and between periods of longer and shorter day-lengths. BMI, age, gender, and overall PA all contributed to the variations in sleep parameters using multiple regression analysis. Conclusions: The sleep and PA characteristics of this unique population revealed some gender differences, but there was limited variation in response to significant daylight changes which may be due to long-term adaptation.

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DO - 10.5664/jcsm.5486

M3 - Journal article

VL - 12

SP - 203

EP - 213

JO - The Journal of Clinical Sleep Medicine

JF - The Journal of Clinical Sleep Medicine

SN - 1550-9389

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Brychta RJ, Arnardóttir NÝ, Jóhannsson E, Wright EC, Eiriksdottir G, Gudnason V et al. Influence of Day Length and Physical Activity on Sleep Patterns in Older Icelandic Men and Women. The Journal of Clinical Sleep Medicine. 2016;12(2):203-213. https://doi.org/10.5664/jcsm.5486