Table 1.

Demographic data and routine monitoring parameters in 23 preterm neonates with FIRS and 23 preterm neonates without FIRS (FIRS group and non-FIRS group).

	FIRS	non-FIRS	p-value
n	23	23
Gestational age (weeks)	32.1 (30.3–33.0)	32.0 (30.4–33.1)	0.895
Birth weight (g)	1,670 (1,214–1,958)	1,630 (1,400–1,994)	0.965
Female sex	12 (52)	13 (57)	0.767
Delivery by cesarean section	19 (83)	23 (100)	0.109
Umbilical artery pH	7.31 (7.27–7.34)	7.33 (7.30–7.33)	0.485
Mean arterial blood pressure (mmHg)	38 ± 6	43 ± 12	0.154
Rectal body temperature (°C)	36.5 ± 0.4	36.9 ± 0.4	0.007*
Apgar 1 min	8 (7–9)	8 (8, 9)	0.930
Apgar 5 min	9 (8, 9)	9 (8, 9)	0.364
Apgar 10 min	9 (9, 10)	9 (9)	0.828
Interleukin-6 (pg/ml)	19.7 (12.2–37.0)	5.4 (3.0–6.7)	<0.001*
Procalcitonin (ng/ml)	0.17 (0.12–0.26)	0.19 (0.15–0.23)	0.426
C-reactive protein 24–48 h after birth (mg/dl)	0.65 (0.60–2.80)	0.90 (0.60–2.30)	0.570
C-reactive protein 48–72 h after birth (mg/dl)	1.30 (0.60–3.80)	0.60 (0.60–1.90)	0.531

Data are presented as mean ± SD, median (IQR) or n (%).

^*p-value < 0.05.