ArticleScientific reports2015
Distribution and heritability of diurnal preference (chronotype) in a rural Brazilian family-based cohort, the Baependi study.
Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.
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Who cites it
30 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Genome-Wide Association Analyses in 128,266 Individuals Identifies New Morningness and Sleep Duration Loci.PLoS genetics · 2016Pooled it
- Early chronotype with advanced activity rhythms and dim light melatonin onset in a rural population.Journal of pineal research · 2020Trial
- Chronotype and Mental Health: Are Late Sleepers More Vulnerable?Current psychiatry reports · 2025Review
- Are humans facing a sleep epidemic or enlightenment? Large-scale, industrial societies exhibit long, efficient sleep yet weak circadian function.Proceedings. Biological sciences · 2025Article
- Urbanisation negatively impacts sleep health and mood in adolescents: a comparative study of female students from city and rural schools of North India.Sleep and biological rhythms · 2024Article
- Influence of Environmental Exposure to Steel Waste on Endocrine Dysregulation andInternational journal of environmental research and public health · 2023Article
- Sleep deprivation among adolescents in urban and indigenous-rural Mexican communities.Scientific reports · 2023Article
- Morningness/eveningness in gestational diabetes mellitus: clinical characteristics and maternal-neonatal outcomes.Archives of endocrinology and metabolism · 2023Article
- Article
- Player Chronotype Does Not Affect In-Game Performance during the Evening (>18:00 h) in Professional Male Basketball Players.Clocks & sleep · 2021Article
- Compared Heritability of Chronotype Instruments in a Single Population Sample.Journal of biological rhythms · 2021Article
- Evening preference correlates with regional brain volumes in the anterior occipital lobe.Chronobiology international · 2021Article
- Article
- Tick-Tock Consider the Clock: The Influence of Circadian and External Cycles on Time of Day Variation in the Human Metabolome-A Review.Metabolites · 2021Review
- Article
- Chronotype and Social Jetlag: A (Self-) Critical Review.Biology · 2019Review
- Mismatch between perceived family and individual chronotype and their association with sleep-wake patterns.Scientific reports · 2019Article
- Academic performance depends on chronotype: Myth or reality?Indian journal of clinical anatomy and physiology · 2019Article
- Chronotype: Implications for Epidemiologic Studies on Chrono-Nutrition and Cardiometabolic Health.Advances in nutrition (Bethesda, Md.) · 2019Review
- Article
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9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Diurnal preference (chronotype) is a useful instrument for studying circadian biology in humans. It harbours trait-like dimensions relating to circadian period and sleep homeostasis, but also has ontogenetic components (morningness increases with age). We used the Morningness-Eveningness questionnaire (MEQ) in the Baependi study, a family-based cohort study based in a small town in Minas Gerais, Brazil. The population is highly admixed and has a cohesive and conservative lifestyle. 825 individuals (497 female) aged 18-89 years (average ± SD = 46.4 ± 16.3) and belonging to 112 different families participated in this study. The average MEQ score was 63.5 ± 11.2 with a significant (P < 0.0001) linear increase with age. Morningness was significantly (P < 0.0001) higher in the rural (70.2 ± 9.8) than in the municipal zone (62.6 ± 11.1), and was also significantly (P = 0.025) higher in male (64.6 ± 10.9) than in female (62.8 ± 11.2) participants. Thus, in spite of universal access to electricity, the Baependi population was strongly shifted towards morningness, particularly in the rural zone. Heritability of MEQ score was 0.48 when adjusted for sex and age, or 0.38 when adjusted for sex, age, and residential zone. The reported MEQ score heritability is more akin to those of previous twin studies than previous family studies.
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