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Figure 2: Receiver operating characteristic curve of the multivariate model to predict chronic obstructive pulmonary disease (All factors significant in univariate analysis were used to create the model). Area under receiver operating characteristic curve 0.9438 (0.9260-0.9616), P < 0.001; model sensitivity: 57.38%, positive predictive value: 93.33%

Figure 2: Receiver operating characteristic curve of the multivariate model to predict chronic obstructive pulmonary disease (All factors significant in univariate analysis were used to create the model). Area under receiver operating characteristic curve 0.9438 (0.9260-0.9616), <i>P</i> < 0.001; model sensitivity: 57.38%, positive predictive value: 93.33%