Comparison of Clinical Features between the High and Low Serum KL-6 Patients with Acute Exacerbation of Interstitial Lung Diseases

Table 2

Multiple stepwise regression analysis of primary predictors of 6-month mortality (age, sex, CCIS, diagnosis, LDH, P/F ratio, ground-glass opacity, and honeycomb scores).

Variable	95% confidence interval	Odds ratio	values
(A) Low KL-6 group
CCIS	1.502	1.242–1.838	<0.001
Sex, male vs. female	5.751	1.121–105.163	0.033
Serum LDH	1.002	1.000–1.005	0.058
(B) High KL-6 group
Serum LDH	1.006	1.003–1.009	<0.001

CCIS: Charlson Comorbidity Index score; LDH: lactate dehydrogenase; P/F ratio: partial pressure of oxygen in arterial blood/fraction of inspired oxygen.