Table 3.

Cox regression analysis for the occurrence of CLABSI

Univariate analysis			Multivariate analysis
Dependent variable: CLABSI	Hazard ratio (CI 95%)	p	Dependent variable: CLABSI	Hazard ratio (CI 95%)	p
ECC (vs BCV)	14.2 (1.8–117)	0.013	ECC (vs BCV)	36 (2.5–511)	0.008
CVC placement attempts	1.6 (1.1–2.3)	0.004	CVC placement attempts	1.8 (1.2–2.7)	0.004
RDS (surfactant)	4.6 (1.03–20.8)	0.045	RDS (surfactant)	11.1 (1.2–101)	0.033
Antibiotic days during CVC	0.87 (0.776–0.97)	0.017
Weight at insertion (grams)	0.998 (0.995–1)	0.099

Variables considered in the univariate analysis: type of catheter (ECC vs BCV) sex, gestational age at insertion, weight at insertion, cesarean delivery, CRIB score, 5 min Apgar score, respiratory distress syndrome (RDS), day of CVC insertion, parenteral nutrition days per CVC, antibiotics days per CVC, transfusion of packed red blood cells during CVC permanence, and CVC placement attempts (number of punctures). Only variables with a p value < 0.1 in the univariate analysis are shown. Only variables that remained significant in the multivariate analysis are shown