Comparative Study of Circulating MMP-7, CCL18, KL-6, SP-A, and SP-D as Disease Markers of Idiopathic Pulmonary Fibrosis

Table 4

C statistic for Cox regression models predicting 5-year mortality of patients with idiopathic pulmonary fibrosis.

	C index	95% CI
Covariates only	0.705	0.559–0.851
Covariates plus MMP-7 (continuous)	0.741	0.605–0.876
Covariates plus KL-6 (continuous)	0.769	0.643–0.895
Covariates plus MMP-7 + KL-6 (continuous)	0.816	0.707–0.923

See legends of Tables 1 and 2 for expansion of abbreviations.
Covariates include age (continuous variable), sex, and percent predicted vital capacity.