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Stool specimens used in this study
| Stool specimen | No. of specimens | Mean day of stool sampling ± SDa |
|---|---|---|
| Meconium | 99 | 0.7 ± 1.0 |
| Day 3 | 83 | 2.8 ± 1.0 |
| Day 7 | 100 | 8.4 ± 2.1 |
| Day 30 | 108 | 31 ± 3.4 |
| Day 90 | 107 | 91 ± 5.9 |
| Weaning | 75 | 143 ± 20 |
| Day 180 | 105 | 182 ± 7.9 |
The day of delivery of each infant was defined as day 0.
