Figures & data
Figure 1. Flowchart of involving subjects. Abbreciation: COPD, chronic obstructive pulmonary disease.
![Figure 1. Flowchart of involving subjects. Abbreciation: COPD, chronic obstructive pulmonary disease.](/cms/asset/547b56b2-6852-4a63-afaa-a136b2917d93/icop_a_2042504_f0001_b.jpg)
Table 1. Comparison of characteristics between development and validation dataset.
Table 2. Results of logistic regression and scores in development set.
Figure 2. Distribution of clusters of questions in the screening questionnair among different range of score in development dataset. BMI, body-mass index.
![Figure 2. Distribution of clusters of questions in the screening questionnair among different range of score in development dataset. BMI, body-mass index.](/cms/asset/740d41ff-c5ca-4f20-b36e-ccd6b65491d0/icop_a_2042504_f0002_c.jpg)
Figure 3. ROC for screening questionnaire in development set (A. AUC = 0.7737) and validation set (B. AUC = 0.7711). Abbreviation: AUC, area under curve.
![Figure 3. ROC for screening questionnaire in development set (A. AUC = 0.7737) and validation set (B. AUC = 0.7711). Abbreviation: AUC, area under curve.](/cms/asset/792a781f-885c-4fda-8b3a-9e8108fa05cf/icop_a_2042504_f0003_b.jpg)
Table 3. Accuracy, Positive and negative predictive values for COPD across different score thresholds.
Data availability statement
Enquiries for data generated or analyzed during this study can be directed to the corresponding author.