Comparison of the Diagnostic Performance of Five Clinical Questionnaires for Chronic Obstructive Pulmonary Disease

Figure 2

Comparison of the diagnostic performance for COPD among COULD IT BE COPD, CDQ, COPD-PS, LFQ, and PUMA questionnaires. (a) Comparison between the five questionnaires. (b) Comparison between questionnaires excluding COULD IT BE COPD. AUC: area under the receiver operating characteristics curve. value result of the DeLong test.

(a)

(b)