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Table 1 Clinical and demographic characteristics of infants with and without RDS

From: Analysis of nitric oxide synthase gene polymorphisms in neonatal respiratory distress syndrome among the Chinese Han population

 

Control group (n = 227)

RDS group (n = 189)

P value

Gestational age (weeks)

35.1 ± 2.0

32.2 ± 2.5

0.000

Birth weight (g)

2388 ± 625

1813 ± 504

0.000

Gender (male/female)

123/104

118/71

0.090

Apgar score (5th min)

8.1 ± 1.3

4.3 ± 1.2

0.000

Mode of delivery (V/CS)

108/119

76/113

0.132

Maternal age (years)

27.7 ± 5.4

29.0 ± 5.6

0.225

PROM >18 hours

71/156

63/126

0.655

Use of antenatal steroid

39/188

44/145

0.121

Use of surfactant

158/69

147/42

0.061