Fig. 4
From: Prediction of lung emphysema in COPD by spirometry and clinical symptoms: results from COSYCONET
Summary of the results of the decision trees obtained for questionnaire data in combination with spirometry and CO diffusing capacity in terms of the transfer coefficient KCO. Only those conditions are shown that maximize the odds ratios for each of the two phenotypes. The conditions favouring either the emphysema- or the airway-dominated phenotype are given within the boxes, while the numbers indicate the respective odds ratios that can be derived from Figs. 1, 2 and 3. The interpretation of the questionnaire items is identical with that of the original CAT, SGRQ or mMRC questionnaires, the %predicted values for KCO refer to GLI [21]