Relative humidity
Intervention2 papers3 findings
C · W · M · H: cells, worms or flies, mice, humans. Dark: independent labs found the same change there. Light: one lab or one study. Outline: nothing yet.
Labs are independent when their papers share no last author and no institution.
Against: findings that point the other way from most findings on the same outcome.
No results posted: trials that ended more than a year ago with no results on ClinicalTrials.gov and no paper in ARN’s record.
Company ties: findings with an author at a company, or from a paper that declares the maker’s interest.
- Humans2
Outcomes
1Frailty
upin humans1
1 study
Frailty
upin humans1
Relative humidity increases frailty in humans (β=0.22, P<0.01).
Humansn = 19,582
[Environmental relative humidity, frailty, and risk of incident stroke among middle-aged and older adults in China: A prospective cohort study] · Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 28 Jul 2026
Associations
2Cognitive impairment
upin humans1
1 study
Cognitive impairment
upin humans1
Relative humidity is associated with cognitive impairment in humans (median coefficient = 2.00, IQR: 1.73–2.14).
Humans
Spatial heterogeneity of cognitive impairment and its association with relative humidity in China: A geographically weighted regression analysis · Research Square · 31 Aug 2026 · Preprint
Stroke
upin humans1HR 1.279
1 study
Stroke
upin humans1HR 1.279
Relative humidity raises the risk of stroke in humans (HR 1.279, 95% CI 1.227 to 1.331).
Humansfully adjusted modeln = 19,582
[Environmental relative humidity, frailty, and risk of incident stroke among middle-aged and older adults in China: A prospective cohort study] · Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 28 Jul 2026