Predictors of long-term mortality in the elderly: The Dubbo Study

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Simons, Leon A, Simons, Judith, Friedlander, Yechiel and McCallum, John (2011) Predictors of long-term mortality in the elderly: The Dubbo Study. Internal Medicine Journal, 41 (7). pp. 555-560. ISSN 1444-0903


Background: This study examines the predictors of long-term all-causes mortality (ACM) in Australian senior citizens. Methods: We have analysed ACM in a cohort of 2805 citizens, 1233 men and 1572 women aged �60 years, first examined in 1988 and followed for 20 years. Hazard ratios and 95% confidence intervals for ACM were obtained from Cox models employing conventional predictors. Results: Over 20 years 66% of men (815/1233) and 53% of women (833/1572) died. Constant proportional hazard over the 20 years was demonstrated for all predictors, indicating similar relative hazard of ACM during long-term or short-term follow up. There was significant prediction of ACM by current smoking (hazard ratio 1.96, 95% confidence interval 1.57–2.43 in men; 1.67, 1.32–2.10 in women), high blood pressure (1.37, 1.03–1.81; 1.41, 1.07–1.86), diabetes (1.46, 1.17–1.82; 1.83, 1.43–2.34), impaired peak expiratory flow (1.39, 1.15–1.69; 1.80, 1.47–2.21), coronary heart disease at study entry in men (1.33, 1.13–1.57), physical disability (1.38, 1.13–1.68; 1.45, 1.17–1.79) and alcohol intake (0.82, 0.69–0.97; 0.77, 0.66–0.89 respectively). ACM was not significantly predicted by standard lipid parameters. Over the 20-year period smoking was associated with reduced survival of 41 months in men and 25 months in women, hypertension with reduced survival of 20 and 17 months, and diabetes with reduced survival of 24 and 30 months respectively. Conclusions: The findings confirm the contribution of cigarette smoking, hypertension and diabetes to ACM in senior citizens, conditions that are potentially amenable to intervention.

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Item type Article
DOI 10.1111/j.1445-5994.2009.02106.x
Official URL
Subjects Historical > FOR Classification > 1117 Public Health and Health Services
Historical > Faculty/School/Research Centre/Department > Centre for Strategic Economic Studies (CSES)
Current > Division/Research > Other
Keywords ResPubID24951, all-causes mortality, ACM, predictors, elderly, cohort study, preventive medicine, multivariate Cox model
Citations in Scopus 11 - View on Scopus
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