Comparison of CRP, Procalcitonin, Neutrophil Counts, Eosinophil Counts, sTREM-1, and OPN between Pneumonic and Nonpneumonic Exacerbations in COPD Patients

Table 4

A logistic regression model for predicting CAP in AECOPD by clinical symptoms.

Variables	OR (95% CI)	Value
Purulent sputum	2.39 (1.17–4.87)	0.02
Increased sputum volume	—	0.22
Diabetes mellitus	2.69 (1.13–6.39)	0.03
SCS treatment	—	0.18
FEV1, % predicted	—	0.13

Variables, including purulent sputum, increased sputum volume, diabetes mellitus, SCS treatment, and FEV1, % predicted, were retained as covariates in the forward stepwise selection procedure of multivariate analysis.