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Comparative Study
. 2008 Feb 5;117(5):614-22.
doi: 10.1161/CIRCULATIONAHA.107.734764. Epub 2008 Jan 22.

Exercise capacity and mortality in black and white men

Peter Kokkinos  1 , Jonathan Myers, John Peter Kokkinos, Andreas Pittaras, Puneet Narayan, Athanasios Manolis, Pamela Karasik, Michael Greenberg, Vasilios Papademetriou, Steven Singh
Affiliations
Comparative Study

Exercise capacity and mortality in black and white men

Peter Kokkinos et al. Circulation. .

Abstract

Background: Exercise capacity is inversely related to mortality risk in healthy individuals and those with cardiovascular diseases. This evidence is based largely on white populations, with little information available for blacks.

Methods and results: We assessed the association between exercise capacity and mortality in black (n=6749; age, 58+/-11 years) and white (n=8911; age, 60+/-11 years) male veterans with and without cardiovascular disease who successfully completed a treadmill exercise test at the Veterans Affairs Medical Centers in Washington, DC, and Palo Alto, Calif. Fitness categories were based on peak metabolic equivalents (METs) achieved. Subjects were followed up for all-cause mortality for 7.5+/-5.3 years. Among clinical and exercise test variables, exercise capacity was the strongest predictor of risk for mortality. The adjusted risk was reduced by 13% for every 1-MET increase in exercise capacity (hazard ratio, 0.87; 95% confidence interval, 0.86 to 0.88; P<0.001). Compared with those who achieved <5 METs, the mortality risk was approximately 50% lower for those with an exercise capacity of 7.1 to 10 METs (hazard ratio, 0.51; 95% confidence interval, 0.47 to 0.56; P<0.001) and 70% lower for those achieving >10 METs (hazard ratio, 0.31; 95% confidence interval, 0.26 to 0.36; P<0.001). The findings were similar for those with and without cardiovascular disease and for both races.

Conclusions: Exercise capacity is a strong predictor of all-cause mortality in blacks and whites. The relationship was inverse and graded, with a similar impact on mortality outcomes for both blacks and whites.

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