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ROC curve based on the five selected predictors (C-index =0.67), the full multivariate model (C-index =0.68) and the individual predictors: post-bronchodilator FEV1 (C-index =0.62) and the number of COPD exacerbations during the previous year (C-index =0.62).
Abbreviations: COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 second; ROC, receiver operating characteristic.
