Background Research documenting the relevance of neighbourhoods for the health of older adults has focused on global physical functioning outcomes, such as disability, rather than physiologic impairments that lead to disability. Muscle weakness is an age-related impairment and a central mechanism of disability. Evaluating neighbourhood effects on muscle weakness may offer insight into physiologic mechanisms of disability. We examined the association between perceived neighbourhood disorder and muscle strength in a nationally representative sample of US adults aged 51+.
Methods Among 11 277 participants (57% women; mean age: 66.6 years) in the Health and Retirement Study (2012–2014), we investigated whether self-reported neighbourhood physical disorder (1–7 scale, mean=2.61, SD=1.45); presence of vandalism/graffiti, litter, deserted houses, feeling safe walking alone) was associated with mean hand grip strength using linear regression models with sampling weights. We tested whether the association between neighbourhood disorder and grip strength differed by age and gender.
Results After adjusting for demographic characteristics, marital status, education and household wealth, residence in neighbourhoods with high perceived physical neighbourhood disorder was associated with lower muscle strength for men (β=−1.95 kg; 95% CI, 2.68 to –1.22) and to a lesser extent, for women (β=−0.64 kg, 95% CI, −1.11 to –0.19), (p for interaction <0.0001). For both men and women, associations between neighbourhood physical disorder and grip strength were more adverse among the middle aged (51–64 years) than for older (ages 65+) adults.
Discussion Perceived neighbourhood disorder was associated with lower muscle strength. Future studies should more rigorously evaluate causality and evaluate potential interventions.
- epidemiology of ageing
- functioning and disability
- social epidemiology
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Contributors KAD drafted the conceptual model, manuscript and completed the statistical analyses. MMG and PMC provided feedback on the conceptual model, assisted with the interpretation of the data and provided critical review of the manuscript.
Funding This research was supported by the National Institute on Aging of the National Institutes of Health under Award T32-AG049663.
Competing interests PMC reports consultation to BioAge Labs, and grants to her institution from Abbott and Nestle, all for work outside of this project.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.
Data availability statement Data are available in a public, open access repository. Data are from the health and retirement study and can be accessed at https://hrs.isr.umich.edu.
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