Table 1 Infant characteristics comparison between VLBW and NBW group

Number

102

87

Gestational age [weeks median, (IQR)]

29.6

(27.3–31.7)

39.8

(38.4–40.1)

p < 0.001

Birth weight [grams median, (IQR)]

1224

(860–1410)

3315

(3120–3700)

p < 0.001

Apgar score [number median, (IQR)]

At 1 min

7

(6–8)

10

(9–10)

p < 0.001

At 5 min

8

(7–9)

10

(10–10)

p < 0.001

At 10 min

8,5

(8–9)

10

(10–10)

p < 0.001

Mode of delivery [N, (%)]

Vaginal

12

(11.8)

71

(81.6)

p < 0.001

Caesarean section

90

(88.2)

16

(18.4)

p < 0.001

Antibiotic treatment [N, (%)]

AMPI

69

(67.6)

0

(0.0)

p < 0.001

AMPI + surfactant

59

(57.8)

0

(0.0)

p < 0.001

GENTA

66

(64.7)

0

(0.0)

p < 0.001

Other

48

(47.1)

0

(0.0)

p < 0.001

Infection [N, (%)]

Early infection

50

(49.0)

0

(0.0)

p < 0.001

Late infection

38

(37.3)

0

(0.0)

p < 0.001

General diseases [N, (%)]

Present overall

24

(23.5)

3

(3.4)

p < 0.001

Bronchial asthma

4

(3.9)

0

(0.0)

p = 0.06

Atopic eczema

0

(0.0)

2

(2.3)

p = 0.121

Respiratory disorders

7

(6.9)

0

(0.0)

p = 0.011

Heart defects

10

(9.8)

1

(1.1)

p = 0.009

Renal disorders

1

(1.0)

0

(0.0)

p = 0.353

Neurological disorders

2

(2.0)

0

(0.0)

p = 0.187

Visual impairment

1

(1.0)

0

(0.0)

p = 0.353

Medication [N, (%)]

Regular use

8

(7.8)

0

(0.0)

p = 0.007