Infant Participant Characteristics by Study Arm
| Control (n = 92) | Probiotic (n = 92) | |
|---|---|---|
| Boys | 48 (52%) | 44 (48%) |
| Racea | ||
| White | 77 (85%) | 72 (78%) |
| African American | 10 (11%) | 14 (15%) |
| American Indian, Alaskan Native | 12 (13%) | 10 (11%) |
| Asian | 19 (21%) | 22 (24%) |
| Pacific Islander | 4 (4%) | 3 (3%) |
| Other | 8 (32%) | 18 (20%) |
| Hispanic ethnicity | 19 (21%) | 27 (29%) |
| Gestational age, wk (SD) | 38.9 (1.3) | 39.0 (1.4) |
| Birth weight, g (SD) | 3440 (442) | 3427 (506) |
| Cesarean delivery | 21 (23%) | 27 (29%) |
| Mean number of months breastfeeding in first year of life (SD) | 7.5 (5.1) | 7.7 (4.9) |
| Breastfeeding exposure | ||
| None | 20 (22%) | 16 (17%) |
| <12 mo | 31 (34%) | 29 (32%) |
| ≥12 mo | 41 (45%) | 47 (51%) |
↵a The percentage of infants in each race category is >100%. Fifty-nine (32%) parents of these infants selected more than 1 race when describing their infants.