Risk factors for bronchopulmonary dysplasia among preterm infants born before thirty-two weeks of gestation in Palestinian private hospitals

Table 1 Demographic characteristics of the studied premature infants

Variable	Category	n (%)	mean (SD)	Minimum	Maximum
Gestational age at birth	Less than 28 weeks	14 (11.8)
	Twenty-eight to thirty-two weeks	105 (88.2)
Sex	Female	41 (34.5)
	Male	78 (65.5)
Birth weight (g)			1257.45 (196.57)	500	1500
Apgar score	At 1 minute		5.87 (1.34)	4	8
Apgar score	At 5 minutes		8.18 (0.72)	7	9