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the claim
Average sleep duration varies significantly across different countries
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
2 sources for · 0 against

Evidence from cross-national studies demonstrates that average sleep duration varies significantly across different countries, influenced by various cultural, social, and environmental factors.

Evidence for · 2
A CROSS-CULTURAL COMPARISON OF SLEEP DURATION BETWEEN U.S. AND AUSTRALIAN ADOLESCENTS: THE EFFECT OF SCHOOL START TIME, PARENT-SET BEDTIMES, AND EXTRA-CURRICULAR LOAD
2012 · cited by 125
This study found significant differences in sleep duration between adolescents in Australia and the United States, highlighting the role of extrinsic cultural factors.
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The analysis

The claim states that average sleep duration varies significantly across different countries. Papers [1] and [7] directly examine international and cross-cultural differences in sleep duration, confirming significant variations between populations in different countries. Therefore, the claim is supported by the retrieved literature.

More for · 1
Sleep and happiness: socio-economic, population and cultural correlates of sleep duration and subjective well-being in 52 countries
2023 · cited by 12
This ecological study investigated sleep duration across 52 countries and noted considerable differences between countries in how much people sleep on average.
Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. Epidemiology of anal human papillomavirus infection and high-grade squamous intraepithelial lesions in 29 900 men according to HIV status, sexuality, and age: a collaborative pooled analysis of 64 studiespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. A CROSS-CULTURAL COMPARISON OF SLEEP DURATION BETWEEN U.S. AND AUSTRALIAN ADOLESCENTS: THE EFFECT OF SCHOOL START TIME, PARENT-SET BEDTIMES, AND EXTRA-CURRICULAR LOADpeer-reviewedsupports
  3. Molecular epidemiology of human Campylobacter jejuni shows association between seasonal and international patterns of diseasepeer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Stay-at-home circumstances do not produce sleep disorders: An international survey during the COVID-19 pandemicpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Sex differences in deterioration of sleep properties associated with aging: a 12-year longitudinal cohort studypeer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. The association between dietary quality, sleep duration, and depression symptoms in the general population: findings from cross-sectional NHANES studypeer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. No evidence for an epidemiological transition in sleep patterns among children: a 12‐country studypeer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Sleep and happiness: socio-economic, population and cultural correlates of sleep duration and subjective well-being in 52 countriespeer-reviewedsupports
  9. Association between sleep duration and psychological resilience in a population-based survey: A cross-sectional studypeer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. Estrogen-related receptor gene expression associates with sex differences in cortical atrophy in isolated REM sleep behavior disorderpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. SLEEP ARCHITECTURE CHANGES IN DEPRESSION AND SLEEP-RELATED DISORDERSpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. Digital Engagement and Sleep Dysregulation in Young Adults: A Narrative Review.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked06 Aug 2026
judged → SUPPORTED · 7706 Aug 2026
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