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Background: Researchers have emphasized the importance of examining how different factors affect men's and women's functional status over time. To date, the literature is unclear about whether sex affects the rate of change in disability in middle to older age. Researchers have further emphasized the importance of examining how different factors affect men's and women's functional status over time. We examined (a) sex differences in disability trends and (b) the determinants of the rate of change in disability for men and women 50 years and older., Methods: This study utilized the Taiwan Longitudinal Study on Aging Survey, a nationally representative database (four waves of survey data 1996-2007, N = 3429). We modeled and compared the differences in disability trends and the influences of determinants on trends among men and women using multiple-indicator and multiple-group latent growth curves modeling (LGCM). Equality constraints were imposed on 10 determinants across groups., Results: Once disability began, women progressed toward greater disability 18% faster than men. Greater age added about 1.2 times the burden to the rate of change in disability for women than men (p < 0.001). More comorbidities also added significantly more burden to baseline disability and rate of change in disability among women than men (p < 0.001), but women benefited more from higher education levels in lower baseline disability and slower rate of change. Having a better social network was associated with lower baseline disability among women only (p < 0.05). For both men and women, physically active leisure-time activities were beneficial in lower baseline disability (p men and women  < 0.001) and rate of change in disability (p men  < 0.01; p women  < 0.05), with no significant differences between groups., Conclusions: Age may widen the sex gap in the rate of change in disability. However, both sexes benefit from participating in leisure-time activities. Promoting health literacy improves health outcomes and physical function among women., (© 2021. The Author(s).)

Objectives: To understand whether disability trajectories mediated the association between sociodemographic characteristics and later health care and long-term care services use., Methods: Data were from the Taiwan Longitudinal Study on Aging Survey, 1996-2007 (N =3429). Latent class growth curves modeling and structural equation modeling were applied to examine the effect of disability trajectory as mediator on sociodemographic characteristics and on later services use., Results: Respondents were identified in three trajectories: maintained disability (1.92%), progressive disability (10.56%), and functional independence trajectories (87.52%). The progressive disability trajectory partially and fully mediated the effects of age on later use of health care and long-term care services (the partially mediating effect on age and long-term care service use: β = 0.047, p < 0.001, for example). With the progressive disability trajectory in the model, higher education had a direct effect on greater use of long-term care services (β = 0.020, p =0.020), but through the mediating effect of the disability trajectory, education had an indirect effect on lower use of long-term care services(β = -0.025, p < 0.001). Education had fully mediating effects on the later use of inpatient (β = -0.016, p < 0.001) and emergency services (β= -0.012, p < 0.001)., Conclusions: Preventing older adults from developing a fast-growing disability trajectory could be an effective way to decrease use of health care and long-term care services and related expenditures in late life., (Copyright © 2019 Elsevier B.V. All rights reserved.)

Objectives: The aims of this study were to investigate (1) whether and (2) the extent to which Taiwanese older adults' leisure time activity (LTA) trajectories mediated the potential association between their sociodemographic factors and their functional disability trajectories., Methods: Longitudinal data from four waves of the Taiwan Longitudinal Study on Aging (TLSA), collected between 1996 and 2007, were used for analysis (N = 3,429). Parallel-process latent growth curve modeling was adopted to evaluate the process by which LTA mediated between sociodemographic factors (age, gender, education, self-rated health, comorbidities, and depression) and the outcome process of functional disabilities., Results: When mediated by baseline level of LTA, five sociodemographic factors-age, gender, education level, self-rated health, and number of comorbidities-had significant and negative mediating effects on baseline or change in functional disability, thus improving disability outcomes. However, four of the sociodemographic factors (age, education level, and number of comorbidities), when mediated through the rate of change in LTA, were found to have significant and positive mediating effects, which increased disability levels. The proportion of effects mediated by the LTA trajectory ranged from 0% to 194%., Discussion: The large proportion of effects mediated through the LTA process underlines the importance of LTA to public health policy and health programs for older adults. The study's findings shed light on how to better target populations of older adults to promote an active lifestyle and achieve more successful aging in late life in Asian countries., Competing Interests: The authors have declared that no competing interests exist.

We aimed to identify leisure activity (LA) trajectories and examined the association among baseline characteristics, LA trajectories, and the later disability among older Taiwanese adults. Data were from the Taiwan Longitudinal Study on Aging Survey for the years 1996-2007 ( N = 3,186). LA trajectories were identified by using latent class growth curve modeling. Regression analyses were applied to predict the relationships among baseline characteristics, LA trajectories, and disability. Four LA trajectories-consistent high, consistent low, increasing, and decreasing-were identified. Lower depressive symptom was related to consistently active in LAs. Younger age and fewer comorbidities were related to develop an increasing LA trajectory. Participants in the consistent-high or increasing LA trajectories were more likely to be functionally independent, but those in the decreasing LA subgroup were more at risk of developing disability. The findings suggested that long-term changes in LA over time have benefits on physical health in older population.

Purpose: This study explored how changes in leisure time activities interplayed with changes in functional disability among Taiwanese older adults., Method: A parallel process and multiple-indicator latent growth curve modeling was adopted for analysis of the data. Longitudinal data from four waves of the Taiwan Longitudinal Study on Aging, collected between 1996 and 2007, were used for analysis. Data included responses of 5451 older adults with a mean age of 67.16 years (SD = 2.51) in 1996., Results: Compared to baseline level of leisure time activities, increasing the rate of change in leisure time activities has more than three times the effect on slowing down the progression of functional disabilities. The baseline functional disabilities did not significantly predict the changes in leisure time activity participation., Conclusion: Engagement in leisure time activity in later life is associated with a slower speed of progression toward functional disability. Early functional disability may not inhibit leisure time activity participation in later life.

Our aim was to identify disablement factors, including predisposing, intra-individual, and extra-individual factors, which predict the rate of change in general functional disability (GFD) in older adults. This study utilized the Taiwan Longitudinal Study on Aging Survey in 1996-2007 (N=3,186). Multiple-indicator latent growth curve modeling was used to examine how 12 disablement factors predicted the rate of change in GFD. GFD trajectories were modeled using Nagi's functional limitations, activities of daily living, and instrumental activities of daily living. Greater age (B=.025), female gender (B=.114), and greater numbers of comorbidities (B=.038) were associated with faster increase in GFD. Education (B=-.005) and participation in physically active leisure time activities (B=-.031) were associated with slower increase in GFD. Our findings add to the understanding of how disablement factors contribute to the rate of change in GFD. Predisposing factors played the main role. However, the factors we found to be associated with the rate of change in GFD in older adults were slightly different from the factors reported in the literature. Decreasing the number of comorbidities and increasing the level of physically active leisure time activity should be considered priorities for preventing disability as people age., (Copyright © 2016. Published by Elsevier Ireland Ltd.)

Objectives: We aimed to identify disability trajectories and examine whether the predisposing, intra-individual, and extra-individual factors in the disablement process predicted different disability trajectories among older adults in Taiwan., Methods: Data were from the Taiwan Longitudinal Study on Aging (TLSA) Survey in 1996-2007 (n=3186). Disability trajectories for activities of daily living (ADLs) and instrumental activities of daily living (IADLs) were identified by using latent class growth curves modeling. Factors including demographics, health conditions, health behaviors, social relations, and use of assistive devices were significantly predicted different disability trajectories of older adults over the following 11 years by applying hierarchical logistic regression., Results: Three disability trajectories--maintained function, progressive disability, and consistent disability--were identified. Predisposing factors such as younger age, more educational attainment, and better health conditions had protective effects of leading to a later healthier maintained function trajectory. Intra-individual factors such as engaging in leisure time activities (LTAs) were positively related to the maintained function trajectory but negatively related to the consistent disability trajectory; decreasing social networks was common to those on consistent disability trajectory; dissatisfaction with social support was noted in maintained function trajectory group. An extra-individual factor, using assistive devices, was significantly related to maintaining older adults' disability levels, even for those who started disabled., Conclusions: The findings suggested that predisposing, intra-individual, and extra-individual factors play different roles in the development of later disability trajectories. More educational attainment, better health conditions, active in LTAs, and using assistive devices might benefit the maintenance of functioning in Taiwanese older adults., (Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.)