Topic
Epidemiology
Epidemiology is a recurring research topic on Health Canon. This hub collects related explainers and protocols, newest first, each with evidence grades and practical decision frameworks.
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Environmental Health
Mold, Damp Buildings, Asthma, and Wheeze: Epidemiology
Meta-analyses link residential dampness and visible mold to ~30–50%+ higher odds of asthma and respiratory symptoms—odor counts as an exposure proxy.
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Light & Recovery
Sun Exposure, Vitamin D, and Population Mortality: Cohorts vs VITAL Reality
Swedish sun-avoidance cohorts associate with higher mortality—confounded. VITAL found no primary CVD/cancer benefit from 2000 IU vitamin D in general adults. UV remains a proven carcinogen.
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Light & Recovery
Laukkanen JAMA Sauna Study: CVD and Sudden Cardiac Death in Finnish Men
KIHD 2,315 men, ~20.7-year follow-up: 4–7 saunas/week vs 1× associated with HR 0.37 SCD and 0.50 fatal CVD after adjustment—graded dose-response, not proven causation.
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Light & Recovery
Sauna and All-Cause Mortality: Mixed-Sex Extensions Beyond the 2015 Male Paper
All-cause HR ~0.60 for frequent sauna in KIHD men; mixed-sex CVD mortality extensions and joint fitness analyses support directional benefit—with Finnish cultural generalizability limits.
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Nutrition
Seed Oils, Linoleic Acid Biomarkers, and Mendelian Randomization
Higher circulating linoleic acid associates with lower cardiovascular risk in major pooling studies—conflicting with some heated-oil narratives. MR is not a supermarket policy engine.
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Nutrition
Organic Food and Cancer Risk: Epidemiology Explained
Cohort signals, residual confounding, and what residue pathways can and cannot prove.
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Environmental Health
RF, Glioma & Acoustic Neuroma: What Epidemiology Actually Shows
IARC 2B rested on limited case-control signals; large modern cohorts are largely null—communicate both without erasing uncertainty.
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Nutrition
Organic Food, Obesity, and Metabolic Risk: Observational Evidence
NutriNet-Santé links organic frequency to lower weight gain risk—confounding still rules.
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Environmental Health
C8 Science Panel Probable Links: What Mid-Ohio Valley PFOA Taught Us
The C8 panel’s six probable-link disease categories still structure how clinicians and courts talk about high PFOA water exposure—kidney and testicular cancers included.
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