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Table 1 Birth, medical and demographic characteristics at randomization

From: Early intervention influences positively quality of life as reported by prematurely born children at age nine and their parents; a randomized clinical trial

 

PI Group N = 72

PC Group N = 74

TR Group N = 75

Infant characteristics

BW, mean ± SD, g

1396 ± 429

1381 ± 436

3619 ± 490

400 - 1000 g, n (%)

20 (28)

20 (27)

 

1001 - 1500 g, n (%)

15 (21)

20 (27)

 

1501 - 2000 g, n (%)

37 (51)

34 (46)

 

GA, mean ± SD, wk

30.2 ± 3.1

29.9 ± 3.5

39.3 ± 1.3

< 28 wk, n (%)

17 (24)

19 (27)

 

28 - 32 wk, n (%)

36 (50)

37 (50)

 

≥33 wk, n (%)

19 (26)

18 (24)

 

Boy, n (%)

38 (53)

39 (53)

40 (54)

Twin, n (%)

16 (22)

14 (19)

0

SGA

11 (14)

10 (13)

 

Prenatal steroid use, n (%)

53 (74)

57 (77)

 

SNAP II, mean ± SD

8.3 ± 10.9

10.4 ± 11.3

 

CRIB score, mean ± SD, N = 85

3.2 ± 2.8

2.7 ± 2.9

 

Received ventilation, n (%)

29 (40)

37 (50)

 

Duration of ventilation, n (%)

7.0 ± 18.6

7.1 ± 17.3

 

Postnatal steroid use, n (%)

9 (13)

10 (14)

 

Oxygen therapy at 36 wk GA, n (%)

11 (15)

14 (19)

 

Abnormal cerebral ultrasound, n (%)

IVH grade 1 or 2

7 (10)

8 (11)

 

IVH grade 3 or 4

3 (4)

5 (7)

 

Periventricular leukomalacia

4 (6)

8 (11)

 

Maternal and social characteristics

Mother’s age, mean ± SD, y

30.8 ± 6.1

29.1 ± 6.4

29.7 ± 6.1

Firstborn child, n (%)

40 (56)

37 (54)

27 (37)

Mother’s education, mean ± SD,a)

14.6 ± 2.8

13.5 ± 3.2

14.9 ± 2.8

Father’s education, mean ± SD,a)

13.8 ± 3.1

13.5 ± 3.2

14.4 ± 3.2

Mother’s monthly income,b)

15.8 ± 7.7

14.6 ± 6.7

15.9 ± 8.0

Father’s monthly income,b)

21.1 ± 8.7

19.9 ± 8.1

21.9 ± 9.8

  1. a) = education in years.
  2. b) = in Norwegian 1000 kroner, calculated for 131 families due to 15 twins.
  3. CRIB = Clinical Risk Index for Babies.
  4. IVH = Intraventricular Hemorrhage.
  5. SGA = defined as BW > 2SD below the mean for GA.
  6. SNAP II = Score of Acute Neonatal Physiology II.