Table 2.

Maternal and neonatal characteristics according with the presence or absence of early death of preterm infants in the state capitals of Northeast Brazil (2007)

	Death <7 days (n = 179)	Survival ≥7 days (n = 448)	p
Maternal age <20 years [n = 627]	56 (31%)	103 (23%)	0.021
Maternal age in years* [n = 627]	24 ± 7	25 ± 7	0.088
Schooling <8 years [n = 627]	90 (50%)	214 (48%)	0.316
Absence of prenatal care [n = 623]	40 (22%)	63 (14%)	0.009
Multiple gestation [n = 627]	34 (19%)	53 (12%)	0.015
Diabetes during gestation [n = 558]	3 (2%)	5 (1%)	0.396
Hypertension in gestation [n = 567]	52 (20%)	153 (37%)	<0.001
Peripartum infection [n = 558]	55 (36%)	144 (36%)	0.531
Antenatal steroids [any dose] [n = 596]	60 (36%)	230 (54%)	<0.001
Cesarean section [n = 623]	64 (36%)	222 (50%)	0.001
Birth weight <1000 g [n = 627]	129 (72%)	158 (35%)	<0.001
Birth weight in grams* [n = 627]	872 ± 229	1082 ± 242	<0.001
Gestational age <28 weeks [n = 627]	106 (59%)	110 (25%)	<0.001
Gestational age in weeks* [n = 627]	27.0 ± 2.3	28.8 ± 1.9	<0.001
Male [n = 627]	110 (62%)	208 (46%)	<0.001
1st minute Apgar score* [n = 604]	4 ± 2	6 ± 2	<0.001
5th minute Apgar score* [n = 607]	7 ± 2	8 ± 1	<0.001
1st minute Apgar <3 [n = 604]	46 (27%)	36 (8%)	<0.001
5th minute Apgar <7 [n = 607]	67 (39%)	48 (11%)	<0.001

*Variable expressed in mean ± standard deviation; brackets refers to the number of subjects of information available among the 627 studied infants.