Table 1 Characteristics of patients’ groups

Gestational age (weeks)^a

38.2 ± 0.8

37.7 ± 0.7

37.7 ± 0.5

0.6

Birth weight (grams)^a

2904 ± 170

2932 ± 200

2893 ± 150

0.3

Gender (male/female)^b

7/4

10/5

4/0

0.2

Mode of delivery (vaginal/cesarean section)^b

7/4

8/6

3/2

0.7

Age of mothers (years)^a

24.1 ± 3.2

23.8 ± 2.9

23.4 ± 4.1

0.5

Pulmonary artery pressure (mm Hg)^c

48 (45–50)

55 (53–57)

65 (64–79)

0.001

Oxygenation index (OI)^c

10.8 (9.6–12.1)

19.7 (16.9–22.3)

31.7(27.9–36.2)

0.001

 Remission/no remission

9/2

9/5

2/3

0.1

 Before treatment

310 (305–330)

350 (340–350)

465 (450–495)

0.001

 After treatment

90 (88–96)

97 (94–99)

105 (98–110)

0.001