Table 1. The basic demographic characteristics of the three groups at birth and at discharge.
| Mt. Sinai (n = 605) | China1 (n = 562) | China 2 (n = 547) | p (Mt. Sinai vs. China1) | p (Mt. Sinai vs. China 2) | p (China 1 vs. China 2) | |
|---|---|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | ||||
| Gestational Age, weeks | 29.4 ± 2.4 | 30.4 ± 1.7 | 30.8 ± 1.3 | 0.000 | 0.000 | 0.004 |
| Birth Weight, grams | 1355 ± 409 | 1531 ± 345 | 1589 ± 352 | 0.000 | 0.000 | 0.029 |
| Birth Weight Z Score | -0.106 ± 0.721 | -0.031 ± 0.729 | -0.030 ± 0.911 | 0.313 | 0.314 | 1.000 |
| Discharge Age, weeks | 7.7 ± 4.7 | 6.1 ± 3.3 | 5.6 ± 2.6 | 0.000 | 0.000 | 0.041 |
| Discharge PMA, weeks | 37.6 ± 2.9 | 36.5 ± 2.3 | 36.4 ± 2.2 | 0.000 | 0.000 | 0.640 |
| Discharge Weight, grams | 2486 ± 529 | 2155 ± 389 | 1973 ± 325 | 0.000 | 0.000 | 0.000 |
| Discharge Weight Z Score | -1.042 ± 0.724 | -1.345 ± 0.782 | -1.647 ± 0.897 | 0.000 | 0.000 | 0.000 |
| Change in Weight, grams | 1130 ± 737 | 624 ± 492 | 384 ± 354 | 0.000 | 0.000 | 0.000 |
| Change in Weight Z Score | -0.939 ± 0.637 | -1.314 ± 0.619 | -1.617 ± 0.744 | 0.000 | 0.000 | 0.000 |
| PMA: Postmenstrual Age |