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Number

Percentage (%)

Age

(in weeks of amenorrhea)

<29

2

4.5

29 - 32

7

15.5

33 - 36

12

26.7

≥37

24

53.3

Sex

Male

24

53.3

Feminine

21

46.7

Weight

(in grams)

<1000

1

2.2

1000 - 1500

8

17.8

1500 - 2400

8

17.8

≥2500

28

62.2

Delay of administration of hepatitis B vaccine

(in hours of life)

≤6

11

24.5

7 - 24

34

75.5

>24

0

0.0

Human hepatitis B immunoglobulins administration

Yes

31

68.9

No

14

31.1

Food type

Breastfeeding

6

13.3

Artificial milk

17

37.8

Mixed food

22

48.9

Delay of introducing breast milk

(in hours of life)

0 - 1

0

0.0

1 - 3

1

3.6

3 - 12

5

17.9

12 - 24

9

32.1

>24

13

46.4

HBsAg at 12 months

Positive

3

6.7

Negative

35

77.8

Unknown

7

15.5