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Prognostic value of the Duke treadmill score in the elderly

Jennifer M. F. Kwok, MD^*, Todd D. Miller, MD, FACC^*, David O. Hodge, MS and Raymond J. Gibbons, MD, FACC^*,*

^* Division of Cardiovascular Diseases and Department of Internal Medicine, Rochester, Minnesota, USA
Department of Biostatistics, Mayo Clinic and Mayo Foundation, Rochester, Minnesota, USA

View larger version (15K): [in a new window]   Figure 1 Kaplan-Meier survival curves of the elderly population based on risk groups classified by the Duke treadmill score. (A) Cardiac survival; (B) Survival free of cardiac death or nonfatal myocardial infarction (MI); (C) Survival free of cardiac death or nonfatal MI or late revascularization. Numbers below abscissa = numbers of patients available for analysis at each time point (see text for details). The number of high risk patients is small, which makes the estimates for this subgroup less reliable. Short-dashed lines = low risk; solid lines = intermediate risk; long-dashed lines = high risk.

View larger version (12K): [in a new window]   Figure 2 Kaplan-Meier curve for cardiac survival of the control population based on risk groups classified by the Duke treadmill score. Numbers below abscissa = numbers of patients available for analysis at each time point (see text for details). Short-dashed lines = low risk; solid lines = intermediate risk; long-dashed lines = high risk.