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Journal of Aging Research
Volume 2011 (2011), Article ID 960848, 5 pages
http://dx.doi.org/10.4061/2011/960848
Research Article

Physical Health and Cognitive Function Independently Contributed to Functional Disability among Chinese Older Adults: Data from Two Asian Metropolises

1Gerontological Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
2Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
3Shanghai Mental Health Centre, Shanghai Jiaotong University, Shanghai 200030, China

Received 30 May 2011; Accepted 15 July 2011

Academic Editor: James Lindesay

Copyright © 2011 Lei Feng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective. We aimed to examine the independent contributions of physical health and cognitive function to disability among Chinese older adults living in two Asian metropolises and explore the potential influences of environment. Design and Participants. Cross-sectional analysis based on data from two population-based studies: the Shanghai Survey of Alzheimer's Disease and Dementia ( ) and the Singapore Longitudinal Ageing Study ( ). Disability was defined as needing help in at least one activity of daily living. Results. The prevalence of functional disability was higher in Shanghai sample (5%) than that in Singapore sample (1.8%). Number of chronic diseases, self-rated health status, cognitive function (measured by the Mini-Mental State Examination), and environment (Singapore versus Shanghai) significantly contributed to functional disability independent of each other. The adjusted Odds Ratio was 1.35 (95%CI 1.22–1.50), 2.85 (95% CI 2.36–3.43), 0.89 (95% CI 0.85–0.94), and 0.68 (95% CI 0.48–0.96), respectively. The strength of associations between health variables and disability appeared to be influenced by environment. Conclusion. Physical health and cognitive function independently contributed to functional disability. The associations are modulated by environmental factors.