Flood

Flood has been studied in 4 papers since 2023: 3 observational studies in people, 1 review. The newest paper, Sep 11, 2025: “Health Outcomes of Older Adults in Libya Following the Derna floods: A Propensity Score Matching Study of Flood-Affected and Unaffected Populations”.

Exposure

4 papers study it5 findingsUpdated

See all 4 papers on flood

At a glance

The findings reach people, from one lab or study. 3 independent labs in 3 countries.

“The victim group was significantly more likely to experience an augmentation of LOC than the non-victim group (adjusted hazard ratio 1.24; 95% confidence interval 1.06-1.45).”
Increased care-need in older long-term care insurance users after the 2018 Japan Floods: a retrospective cohort study based on the Japanese long-term care insurance claimsEnvironmental health and preventive medicine2023doi:10.1265/ehpm.22-00269

None of its findings points the other way.

Humans: a single group. Cells, worms or flies and mice: nothing yet.
  • 3 independent labs in 3 countries
  • Funders: Australian Research Council and 6 more
  • Humans3

What did studies of flood find?

1

Studies of flood measured 1 outcome; the most studied are level of care-need (1 study).

Level of care-need

upin humans1

1 study
  1. Flood is linked with higher level of care-need in humans (disaster victims vs non-victims) (adjusted hazard ratio 1.24; 95% confidence interval 1.06-1.45).

    “The victim group was significantly more likely to experience an augmentation of LOC than the non-victim group (adjusted hazard ratio 1.24; 95% confidence interval 1.06-1.45).”

    Humansdisaster victims vs non-victims5 months after the disastern = 193,723

    Increased care-need in older long-term care insurance users after the 2018 Japan Floods: a retrospective cohort study based on the Japanese long-term care insurance claims

    Environmental health and preventive medicine

What is flood linked with?

4

Studies link flood with 4 measures, most often post-traumatic stress disorder (1 study), respiratory disease mortality (1) and cardiovascular disease mortality (1).

Post-traumatic stress disorder

upin humans1

1 study
  1. Flood raises the risk of post-traumatic stress disorder in humans (flood-related studies in China).

    “posttraumatic stress disorder (PTSD) was the most common condition reported in 27 flood-related studies in China”

    Reviewflood-related studies in China

    Impact of climate-induced floods and typhoons on geriatric disabling health among older Chinese and Filipinos: a cross-country systematic review

    BMC geriatrics

More on Post-traumatic stress disorder

Respiratory disease mortality

upin humans1RR 1.049

1 study
  1. Flood is linked with a higher risk of respiratory disease mortality in humans (RR 1.049 (95% CI 1.008 to 1.092)).

    “and respiratory mortality were 1.021 (95% confidence interval 1.006 to 1.036), 1.026 (1.005 to 1.047), and 1.049 (1.008 to 1.092), respectively.”

    Humansup to 60 days

    Mortality risks associated with floods in 761 communities worldwide: time series study

    BMJ (Clinical research ed.)

Cardiovascular disease mortality

upin humans1RR 1.026

1 study
  1. Flood is linked with a higher risk of cardiovascular disease mortality in humans (RR 1.026 (95% CI 1.005 to 1.047)).

    “The cumulative relative risks for all cause, cardiovascular, and respiratory mortality were 1.021 (95% confidence interval 1.006 to 1.036), 1.026 (1.005 to 1.047)”

    Humansup to 50 days

    Mortality risks associated with floods in 761 communities worldwide: time series study

    BMJ (Clinical research ed.)

Mortality

upin humans1RR 1.021

1 study
  1. Flood is linked with a higher risk of mortality in humans (RR 1.021 (95% CI 1.006 to 1.036)).

    “The cumulative relative risks for all cause, cardiovascular, and respiratory mortality were 1.021 (95% confidence interval 1.006 to 1.036)”

    Humansup to 60 days

    Mortality risks associated with floods in 761 communities worldwide: time series study

    BMJ (Clinical research ed.)

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