Relationships of Changes in Leisure-Time Physical Activity with All-Cause Mortality Among Middle-Aged and Older Adults in Taiwan
| Autor: | Shih-Chieh Kuo, 郭世傑 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 Objectives. It is still equivocal whether physical activity dose-response and physical activity changes in later life are associated with mortality in older adults. Especially in Asian countries. This study aimed to examine the frequency, duration, and intensity of physical activity in relation to risk of death, and also to assess the relationships of changes in leisure-time physical activity with mortality among middle-aged and older Taiwanese. Methods. The analyses were based on nationally representative data from the Taiwan’s Health and Living Status of the Elderly Survey in 1996, 1999 and 2007. Data from the cohort of 5131 participants aged 50 and older at baseline in 1996 with 11 years of follow-up were analyzed. Participants engaging in at least three activity sessions per week were classified as being physically active. Based on physical activity status in 1996 and 1999, four categories of activity status were classified (low/low, low/high, high/low, high/high). Cox’s proportional hazards models were conducted to assess the does-response relation between physical activity and risk of death, and also to examine the associations between changes in physical activity with all-cause mortality. Further analyses were conducted stratified by gender and age groups. Results. Participants engaging in physical activity for 1-2 time and 6 more time pre week had a lower risk of death compared with sedentary individuals(adjusted Hazard Ratio [aHR] and 95% confidence interval [CI] were 0.67, 95% CI: 0.48-0.95; 0.75, 95% CI: 0.58-0.96).Compared with those who remained low in physical activity levels, participants increased and remained high in physical activity levels had significant benefit of risk reduction (aHR were 0.79, 95% CI: 0.66-0.96; 0.75, 95% CI: 0.59-0.96 ). A similar result was observed in both genders. Participants aged 65 years or older with increased or remained high levels of physical activity had a lower risk of mortality. In contrast, these protective associations were attenuated in middle-aged adults. Conclusions. Regular physical activity engagement in later life is related to lower risk of mortality. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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