TY - JOUR
T1 - Habitual sleep/wake patterns in the old order amish
T2 - Heritability and association with non-genetic factors
AU - Evans, Daniel S.
AU - Snitker, Soren
AU - Wu, Shih Hsuan
AU - Mody, Aaloke
AU - Njajou, Omer T.
AU - Perlis, Michael L.
AU - Gehrman, Philip R.
AU - Shuldiner, Alan R.
AU - Hsueh, Wen Chi
PY - 2011/5/1
Y1 - 2011/5/1
N2 - Study Objectives: We sought to evaluate the contribution of genetic and non-genetic factors on habitual sleep/wake patterns in a community-dwelling agrarian population using a physical activity monitoring device, the Actical. Design: Cross-sectional population-based study of healthy Old Order Amish enrolled in the Heredity and Phenotype Intervention (HAPI) Heart Study. Setting: Lancaster County, PA, USA. Participants: 723 healthy adults (54% men) with a mean age of 43.3 ± 13.8 years (range: 20-80). 96% of the subjects were connected into one 5-generation pedigree. Interventions: N/A. Measurements: Participants wore Actical accelerometers 24 hours/day for 7 days to determine physical activity level, as well as habitual wake time, bedtime, and sleep duration. Participants completed the Horne-Östberg Morningness-Eveningness Questionnaire (MEQ), a modified Epworth Sleepiness Scale (ESS), and a lifestyle questionnaire. A sub-study of 164 participants kept sleep diaries. Results: Habitual wake time and bedtime determined by Actical were highly correlated with results from sleep diaries (r = 0.82 for wake time and 0.72 for bedtime, both P < 0.0001). After adjustment for age, sex, occupation, and season, higher activity level was associated with earlier wake time but not with bedtime, and correspondingly with shorter sleep duration. After adjustment for the aforementioned factors and the effects of a shared household, habitual wake time, MEQ score, and ESS score showed significant heritability (wake time h 2 = 0.20, MEQ h2 = 0.21, and ESS h2 = 0.17). Conclusions: Objectively measured wake time, self-reported morningness- eveningness preference, and daytime sleepiness appear heritable and wake time may be associated with physical activity level.
AB - Study Objectives: We sought to evaluate the contribution of genetic and non-genetic factors on habitual sleep/wake patterns in a community-dwelling agrarian population using a physical activity monitoring device, the Actical. Design: Cross-sectional population-based study of healthy Old Order Amish enrolled in the Heredity and Phenotype Intervention (HAPI) Heart Study. Setting: Lancaster County, PA, USA. Participants: 723 healthy adults (54% men) with a mean age of 43.3 ± 13.8 years (range: 20-80). 96% of the subjects were connected into one 5-generation pedigree. Interventions: N/A. Measurements: Participants wore Actical accelerometers 24 hours/day for 7 days to determine physical activity level, as well as habitual wake time, bedtime, and sleep duration. Participants completed the Horne-Östberg Morningness-Eveningness Questionnaire (MEQ), a modified Epworth Sleepiness Scale (ESS), and a lifestyle questionnaire. A sub-study of 164 participants kept sleep diaries. Results: Habitual wake time and bedtime determined by Actical were highly correlated with results from sleep diaries (r = 0.82 for wake time and 0.72 for bedtime, both P < 0.0001). After adjustment for age, sex, occupation, and season, higher activity level was associated with earlier wake time but not with bedtime, and correspondingly with shorter sleep duration. After adjustment for the aforementioned factors and the effects of a shared household, habitual wake time, MEQ score, and ESS score showed significant heritability (wake time h 2 = 0.20, MEQ h2 = 0.21, and ESS h2 = 0.17). Conclusions: Objectively measured wake time, self-reported morningness- eveningness preference, and daytime sleepiness appear heritable and wake time may be associated with physical activity level.
KW - Actical
KW - Circadian
KW - Daytime sleepiness
KW - ESS
KW - Epworth
KW - Heritability
KW - Horne-Östberg
KW - MEQ
KW - Morningness-eveningness
KW - Old order amish
KW - Physical activity
KW - Sleep phase
UR - http://www.scopus.com/inward/record.url?scp=79955552682&partnerID=8YFLogxK
U2 - 10.1093/sleep/34.5.661
DO - 10.1093/sleep/34.5.661
M3 - Article
C2 - 21532960
AN - SCOPUS:79955552682
SN - 0161-8105
VL - 34
SP - 661
EP - 669
JO - Sleep
JF - Sleep
IS - 5
ER -