Zhang S, Peng LN, Otsuka R, Liang CK, Nishita Y, Arai H, Chen LK. Comparative Analysis of Intrinsic Capacity Impairments, Determinants, and Clinical Consequences in Older Community-Dwellers in Japan and Taiwan: Longitudinal Studies Showing Shared Traits and Distinct Presentations.
J Nutr Health Aging 2023;
27:1038-1046. [PMID:
37997726 DOI:
10.1007/s12603-023-2020-z]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 10/19/2023] [Indexed: 11/25/2023]
Abstract
OBJECTIVES
Despite the recognized impact of intrinsic capacity (IC) impairment on healthy aging, international comparisons in different sociocultural contexts are scarce. This study aimed to compare IC impairment among community-dwelling older adults in Japan and Taiwan to explore the context of healthy aging in different countries.
DESIGN
Comparative observational study.
SETTING
National Institute for Longevity Sciences-Longitudinal Study of Aging (NILS-LSA) in Japan and Longitudinal Aging Study of Taipei (LAST) in Taiwan.
PARTICIPANTS
794 individuals (age range, 60.0-86.5 years) from NILS-LSA and 1,358 (60.0-96.7 years) from LAST.
MEASUREMENTS
IC impairment was evaluated across the domains of locomotion, cognition, vitality, sensory capacity, and psychological well-being. Participants were categorized as having impaired IC or healthy. We investigated associations between IC impairment, falls, and all-cause mortality.
RESULTS
IC impairment was present in 54.9% and 37.3% of participants in the NILS-LSA and LAST cohorts, respectively. Male NILS-LSA participants with impaired IC (odds ratio [OR]:1.50, 95% confidence interval [CI]:1.03-2.20), with hearing loss (OR:1.98, 95% CI:1.00-3.90) were more likely to fall. In LAST, impaired locomotion (OR:2.14, 95% CI:1.46-3.14) increased the risk of falls. Men with impaired IC (hazard ratio [HR]; 2.14, 95% CI:1.10-4.15) and visual impairment (HR:2.21, 95% CI:1.15-4.25) and women with impaired psychological well-being (HR:4.94, 95% CI:1.28-18.97) in the NILS-LSA cohort had greater risk for all-cause mortality; however, this was not shown for LAST participants.
CONCLUSION
The prevalence and distribution of IC impairment and associated biomarkers differed significantly between participants in Japan and Taiwan. However, the associations with adverse outcomes remained similar, emphasizing the need for tailored interventions for healthy aging.
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