| Single birth | Twin birth | ||||||
---|---|---|---|---|---|---|---|---|
BOTs(N = 21) | Control(N = 75) | T(χ2) | P | BOTs(N = 5) | Control(N = 15) | T(χ2) | P | |
Gestational age at delivery (days) | 265.7 ± 2.49 | 268.43 ± 1.57 | 0.850 | 0.397 | 254.2 ± 5.67 | 253.0 ± 2.27 | -0.236 | 0.815 |
Birth weight (g) | 3085.2 ± 130.57 | 2880.2 ± 75.78 | -1.289 | 0.201 | 2434.0 ± 113.74 | 2261.7 ± 83.03 | -1.087 | 0.284 |
Birth length (cm) | 48.38 ± 0.48 | 48.27 ± 0.37 | -0.155 | 0.877 | 46.7 ± 0.70 | 45.7 ± 0.52 | -0.975 | 0.336 |