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. 2017 Jun 30;6(7):e005037. doi: 10.1161/JAHA.116.005037

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© 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Kaplan–Meier analysis of oxygen uptake efficiency slope index (OUESI) for 5‐year clinical worsening. Adjusted HR indicates hazard ratio (HR) adjusted for age, sex, and body mass index.