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Comparison of clinical data between the two groups
| Projects | Nonprophylactic supplementation group | Prophylactic supplementation group | Statistics | P-value |
|---|---|---|---|---|
| Gestational age[M(P25 ~ P75)]/weeks | 29.14(27.43 ~ 30.86) | 29.57(27.86 ~ 31.14) | Z = 0.23 | 0.714 |
| Birth weight[M(P25 ~ P75)]/g | 1270(985.0 ~ 1552.0) | 1300(1013.0 ~ 1585.0) | Z = 0.34 | 0.632 |
| Gender(Male/Female, n) | 71/61 | 55/47 | χ2 = 0.31 | 0.787 |
| MBD[n(%)] | 10(7.58) | 2(1.96) | χ2 = 5.53 | 0.023 |
| High risk of MBD[n(%)] | 48(36.36) | 6(5.88) | χ2 = 9.47 | 0.016 |
