Table 1 Characteristics of the infants

Boys/girls

41/49

51/39

2.223

0.179

 Gestational age (weeks, mean ± SD)

39.1 ± 1.2

38.8 ± 1.0

1.462

0.228

 Birth weight (g) (mean ± SD)

3256 ± 383

3253 ± 384

0.467

0.495

 Weight at sample collection (g)

6792 ± 1432

7215 ± 1338

− 2.047

0.042

 Length at sample collection (cm)

63.7 ± 4.7

64.2 ± 4.4

− 0.642

0.522

Age

 0–3 months

20 (22.2%)

20 (22.2%)

103.310

0.240

 3–6 months

47 (52.2%)

47 (52.2%)

 6–9 months

23 (25.6%)

23 (25.6%)

Clinical features

 Diarrhea

58 (64.4%)

–

–

–

 Hematochezia

53 (58.9%)

–

–

–

 Abdominal pain

45 (50.0%)

–

–

–

 Vomiting

22 (24.4%)

–

–

–

 Urticaria

11 (12.2%)

–

–

–

 Constipation

3 (3.3%)

–

–

–