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Corrected arm muscle area: An independent predictor of long-term mortality amongst community-dwelling older adults

Miller, Michelle D., Crotty, Maria, Giles, Lynne C., Bannerman, Elaine, Whitehead, Craig, Cobiac, Lynne, Daniels, Lynne A., & Andrews, Gary R. (2002) Corrected arm muscle area: An independent predictor of long-term mortality amongst community-dwelling older adults. Journal of the American Geriatric Society, 50(7), pp. 1272-1277.

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Abstract

Objective: Older people are at risk of undernutrition because of a number of physiological conditions and lifestyle factors. The purpose of this study was to explore the predictive relationship of the corrected arm muscle area (CAMA) with 8-year mortality in a representative sample of older Australians. Design: Prospective cohort study: The Australian Longitudinal Study of Ageing. Setting: Community. Participants: One thousand three hundred ninety-six participants aged 70 years and older. Measurements: Trained observers measured baseline weight, height, mid upper arm circumference, and triceps skinfold thickness using standard techniques. Body mass index (BMI) and CAMA were calculated. Baseline BMI and CAMA measurements were categorized according to cut-off values proposed by Garrow et al. and Friedman et al. respectively. Subsequent analyses were undertaken using Cox proportional hazards regression. Results: After adjustment for potential confounders (baseline age, gender, marital status, smoking, self rated health, ability to conduct activities of daily living, co-morbidity, cognition performance and presence of depression), those older Australians with a low CAMA (≤21.4cm2 for men and ≤21.6cm2 for women) had an increased risk of mortality at 8 year follow-up (hazard ratio = 1.94, 95% confidence interval = 1.25-3.00, P = .003). There was no increased risk in 8-year mortality identified for those with a high or a low BMI. Conclusion: CAMA is a useful assessment of undernutrition in older adults that has better prognostic value than BMI in predicting death in older, community-living Australians.

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ID Code: 8883
Item Type: Journal Article
Additional Information: The definitive version is available at www.blackwell-synergy.com
Additional URLs:
Keywords: mortality, older, anthropometry, CAMA, Cox proportional hazards regression
DOI: 10.1046/j.1532-5415.2002.50316.x
ISSN: 0002-8614
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700)
Divisions: Current > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2002 American Geriatric Society
Deposited On: 07 Aug 2007
Last Modified: 11 Aug 2011 04:17

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