Table 3.

Comparison of Performance Characteristics Between Multivariate Logistic Regression Prediction Models for 1-Year Mortality in Patients With IPF^*

Models	C Statistic†	95% CI	p Value†
Clinical alone	0.79	0.67–0.91	Reference
Clinical and SP-A/SP-D levels	0.89	0.81–0.98	0.03
Clinical and BAL neutrophil %	0.83	0.73–0.93	0.05
Clinical and biomarkers	0.89	0.81–0.97	0.04

*Clinical model includes age, gender, race, smoking status, FVC, Dlco, and alveolar-arterial oxygen gradient. Biomarkers include SP-A and SP-D levels, and BAL neutrophil percentage.

†Represents the AROC comparison to the clinical-alone model.