Table 2. Multivariate binary logistic regression analysis of factors that can influence procalcitonin level on the first day after birth.

Variable	Crude OR (95% CI)	P value	Adjusted OR* (95% CI)	P value
Preterm (GA<37 wk)	0.31 (0.13–0.74)	0.008	0.84 (0.153–4.658)	NS
VLBW (<1,500 g)	3.12 (0.95–10.21)	NS	0.25 (0.02–2.57)	NS
Prenatal antibiotics	0.24 (0.09–0.62)	0.003	0.08 (0.01–0.51)	0.008
Surfactant administration	3.66 (1.22–10.93)	0.020	39.27 (5.17–298.20)	<0.001
C-reactive protein	201.53 (26.96–1506.76)	<0.001	266.82 (24.83–2867.56)	<0.001
White blood cell	6.961 (3.30–14.67)	<0.001	2.579 (0.94–7.07)	NS

OR, odds ratio; CI, confidence interval; GA, gestational age; VLBW, very low birth weight; NS, not significant (P≥0.05).

^*aOR: adjusted for preterm birth, VLBW, prenatal antibiotics, surfactant administration, serum C-reactive protein level, and white blood cell count.