Given the large number of stratified analyses performed across multiple demographic and geographic strata, the familywise error rate is inflated and some nominally significant subgroup results may represent Type I error; accordingly, effect sizes and 95% confidence intervals are emphasized alongside p -values for subgroup comparisons, and borderline findings are interpreted with appropriate caution. 2.5.3.
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Trends in Unintentional Drowning Mortality Among U.S. Adults Aged ≥25 Years, 1999-2024: A U.S. Surveillance Analysis.
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The overall average annual percentage change for the full study period was 0.55% (95% CI: −0.01 to 1.11, p = 0.054), which did not reach statistical significance at the α = 0.05 level. 3.2.