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Research/Lifestyle/Sleep

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Confounding risk Ecological / population-level data Interventional / RCT evidence Large cohort (100k+) Meta-analysis Observational evidence Reverse causation risk Self-report bias Systematic review

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Clear

1 result

Nighttime sleep duration and all-cause mortality: meta-analysis of prospective cohort studies

Strong

Sleep Meta-analysis Observational evidence Self-report bias

Meta-analysis

U-shaped; ~7 h/night lowest risk; 9–11 h associated with materially higher mortality in meta-analysis

Causal status: Association

Reliability / bias notes: Illness causing long sleep; sleep apnea; shift work; self-report

Cappuccio et al · Sci Rep · 2016 · PMID 26900147

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Important disclosures. This research library is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment, and is not a substitute for consultation with a qualified healthcare professional.

Entries summarise population-level associations from published research. They describe patterns across large groups of people, not a prediction about any one individual — "association" is not the same as "if you change this, your risk changes by this amount."

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