4.5 Article

Built environments and frailty in older adults: A three-year longitudinal JAGES study

Journal

ARCHIVES OF GERONTOLOGY AND GERIATRICS
Volume 103, Issue -, Pages -

Publisher

ELSEVIER IRELAND LTD
DOI: 10.1016/j.archger.2022.104773

Keywords

Frailty; Built environment; Neighborhood environment; Multilevel regression

Funding

  1. MEXT (Ministry of Education, Culture, Sports, Science and Technology, Japan)-Supported Program for the Strategic Research Foundation at Private Universities (2009-2013)
  2. JSPS (Japan Society for the Promotion of Science) KAKENHI [JP18390200, JP22330172, JP22390400, JP23243070, JP23590786, JP23790710, JP24390469, JP24530698, JP24683018, JP25253052, JP25870573, JP25870881, JP26285138, JP26882010, JP15H01972, 20H00557, 19K20909]
  3. Health Labour Sciences Research Grant [H22-Choju-Shitei-008, H24-Chikyukibo-Ippan-009, H24-Choju-Wakate-009, H25-Kenki-Wakate-015, H25-Choju-Ippan-003, H26-Irryo-Shitei-003, H26-Choju-Ippan-006, H27-Ninchisyou-Ippan-001, H28-choju-Ippan-002]
  4. Japan Agency for Medical Research and Development (AMED) [JP17dk0110017, JP18dk0110027, JP18ls0110002, JP18le0110009, JP19dk0110034, JP20dk0110034, 20lk0310073h0001, 21lk0310073h00]
  5. National Center for Geriatrics and Gerontology [24-17, 24-23, 29-42, 30-22, 20-19, 21-20]
  6. Research Institute and Academia (OPERA) from the Japan Science and Technology (JST) [JPMJOP1831]
  7. The Health Labour Sciences Research Grant [H28-Ninchisyou-Ippan-002, H30-Kenki-Ippan-006, H30-Junkankitou-Ippan-004, 18H00953, 18H03047, 18H04071, 19FA1012, 21GA0101, 21K11108, H24-Junkanki (Seishu)-Ippan-007]

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This study investigated the relationship between built environments and the onset of frailty after 3 years. The findings suggest that both individual-level and community-level built environments are associated with the development of frailty. Negative built environments at the individual level increase the risk of frailty, while positive built environments reduce the risk. In the community level, areas with difficult walking conditions have a lower risk of developing frailty.
Background: This study investigated the relationship between built environments and the onset of frailty after 3 years. Methods: This was a longitudinal study using prospective cohort data from the 2013 Japan Gerontological Evaluation Study on 38,829 older adults nested in 562 comunnities who were not frail. The dependent variable, frailty, was assessed using the Kihon checklist. The explanatory variables were eight items for the built environment at the individual and community levels. To consider each level of built environment simultaneously, multilevel Poisson regression analysis was used to calculate risk ratios and 95% confidence intervals. Results: After 3 years of follow-up, the onset of frailty was 2740 (7.1%) in 2016. At the individual level, there was an increased risk of developing frailty in negative built environments, such as locations with graffiti or garbage (incidence rate ratio (IRR), 1.15; confidence interval (CI), 1.05-1.25). Positive built environments, such as areas with access to parks and sidewalks (IRR, 0.78; CI, 0.70-0.88), lowered the risk of developing frailty. At the community level, the risk of developing frailty was lower only in areas with locations difficult for walking (hills or steps) (IRR, 0.97; CI, 0.94-0.99). Conclusions: At the individual level, frailty onset was associated with all built environments. However, irrespective of their answers, there was a lower risk of developing frailty among older adults living in areas where walking was difficult. It would be desirable to verify whether the risk of developing frailty can be reduced by changing the built environment.

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