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- Arnaud D Kaze, Prasanna Santhanam, Sebhat Erqou, Alain G Bertoni, Rexford S Ahima, and Justin B Echouffo-Tcheugui.
- Department of Medicine, University of Maryland Medical Center, Baltimore.
- Am. J. Med. 2021 Jun 1; 134 (6): 769-776.e1.
BackgroundWe evaluated the associations of cardiorespiratory fitness with atherosclerotic cardiovascular disease (ASCVD) by levels of baseline-predicted ASCVD risk among adults with type 2 diabetes.MethodsWe analyzed data from 4203 adults with type 2 diabetes in the Look AHEAD (Action for Health in Diabetes) study. Cardiorespiratory fitness was assessed using maximal exercise testing and categorized into low, moderate, and high; baseline-predicted. ASCVD risk was calculated using the American College of Cardiology/American Heart Association Pooled Cohort Equation. We used Cox regression models to estimate hazard ratios (HR) and 95% confidence intervals (CI) for ASCVD events (fatal and nonfatal myocardial infarction and stroke).ResultsOver a median of 9.6 years, there were 295 ASCVD events. The effect of fitness on outcomes was different across levels of 10-year predicted ASCVD risk (P for interaction < .001). Among participants with a baseline-predicted risk of 7.5% to 20%, the HR of low (vs high) fitness group was 1.94 (95% CI, 1.12-3.35) for ASCVD events. Fitness was not significantly associated with ASCVD events in the groups with baseline-predicted risk <7.5% (HR 1.53; 95% CI, 0.49-4.76) or ≥20% (HR 1.40; 95% CI, 0.88-2.24). A similar pattern was observed for myocardial infarction and stroke separately.ConclusionsIn a large sample of type 2 diabetes individuals, the association of low fitness with incident ASCVD was modified by the baseline-predicted 10-year ASCVD risk. Our findings suggest the utility of assessing fitness in ASCVD risk stratification in type 2 diabetes, especially among those with intermediate predicted 10-year risk of ASCVD.Copyright © 2021 Elsevier Inc. All rights reserved.
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