Demographic characteristics

Exclusive breastfeeding group (n = 15)

Mixed feeding

Group (n = 67)

Artificial feeding group (n = 70)

gestational age (week)

gender

male

female

weight at admission(kg)

mother’s age (year)

34.42 ± 1.68

7

8

2.32 ± 0.35

27.00 ± 2.33

33.37 ± 0.51

31

36

1.92 ± 0.54

25.93 ± 3.43

32.45 ± 0.53

32

38

2.17 ± 0.54

24.95 ± 3.23