ArticleGerontology2026
A Body Shape Index Shows Stronger Associations with Falls than BMI among Older Adults: Evidence from the NHATS Cohort.
Article in Gerontology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionFalls are a major public health concern among older adults, leading to injuries, loss of independence, and increased mortality. A body shape index (ABSI), which integrates waist circumference with height and weight, may better characterize abdominal adiposity than body mass index (BMI). To our knowledge, this is the first study to examine the association between ABSI and fall risk in older adults using data from the National Health and Aging Trends Study (NHATS).
methodsWe analyzed data from NHATS, a nationally representative cohort of US Medicare beneficiaries aged ≥65 years. Baseline anthropometric data (height, weight, waist circumference) from round 1 were linked to 12-month fall outcomes in round 2. Exposures were BMI and ABSI. Survey-weighted logistic regression models estimated associations between each measure and fall outcomes, adjusting for sociodemographic and health-related covariates.
resultsIn adjusted models, ABSI was significantly associated with both any fall (odds ratio [OR] = 1.15, 95% confidence interval [CI]: 1.04-1.27; p = 0.009) and multiple falls (OR = 1.20, 95% CI: 1.03-1.39; p = 0.018). BMI showed weaker and less consistent associations (any fall: OR = 1.02, 95% CI: 1.00-1.03; p = 0.030; multiple falls: OR = 1.01, 95% CI: 0.995-1.03; p = 0.158). Associations were stronger among adults aged ≥80 years and those with multimorbidity or conditions such as arthritis, hypertension, or diabetes.
conclusionABSI may be a more sensitive anthropometric measure than BMI for identifying older adults at risk for falls, underscoring its potential to improve geriatric fall-risk assessment and prevention strategies.
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