Table 1.

Patient characteristics

	Total study population	Vital parameter analysis	No vital parameter analysis	P value
No. of patients	86	37	49
Gestational age (week), median (IQR)	28.3 (26.6–29.7)	29.0 (27.1–30.0)	27.9 (25.7–29.1)	0.007
Birth weight (gm), median (IQR)	1015 (769–1305)	1120 (853–1320)	995 (715–1255)	0.12
Birth weight <10th percentile, n (%)	25 (29)	13 (35)	12 (25)	0.34
Postnatal age (h), median (IQR)	3.3 (2.1–8.5)	5.4 (2.5–13.2)	2.7 (1.9–5.9)a	0.01
Male gender, n (%)	49 (57)	23 (62)	26 (53)	0.51

^aMissing data in seven patients