Table 4.
Comparisons on the basic characteristics and the incidences of adverse pregnancy outcomes between SCH defined by the 2011 and 2017 ATA standards.
| Variables | SCH 2011 | SCH 2017 | P-value | P′ value | *P-value |
|---|---|---|---|---|---|
| Maternal age (years)a | 29 (26–32) | 28 (26–32) | 0.725 | 0.807 | 0.746 |
| Prepregnancy BMI (kg/m2) | 21.03 ± 2.86 | 20.64 ± 2.56 | 0.127 | 0.144 | 0.162 |
| Number of pregnancies, n (%) | 0.920 | 0.907 | 0.363 | ||
| 1 | 267 (45.6) | 72 (47.4) | |||
| 2 | 160 (27.4) | 41 (27) | |||
| 3+ | 158 (27) | 39 (25.6) | |||
| Number of previous births, n (%) | 0.927 | 0.879 | 0.709 | ||
| 0 | 286 (48.9) | 73 (48) | |||
| 1 | 285 (48.7) | 76 (50) | |||
| 2+ | 14 (2.4) | 3 (2) | |||
| Primiparity, n (%) | 286 (48.9) | 73 (48) | 0.850 | 0.654 | 0.786 |
| Gestational age (weeks) | 38 ± 3 | 38 ± 3 | 0.451 | 0.575 | 0.613 |
| Gestational weight gain (kg)a | 12 (10–14) | 12 (9–14.25) | 0.848 | 0.675 | 0.738 |
| Neonatal | |||||
| Male, n (%) | 311 (54) | 88 (58.7) | 0.305 | 0.330 | 0.825 |
| Birth weight (g) | 3,275 ± 501 | 3,206 ± 533 | 0.138 | 0.212 | 0.498 |
| Birth height (cm) | 49.7 ± 1.4 | 49.5 ± 2.1 | 0.194 | 0.129 | 0.279 |
| Apgar scores | 9.9 ± 0.7 | 9.9 ± 1.1 | 0.372 | 0.288 | 0.395 |
| PIH, n (%) | 22 (3.8%) | 10 (6.6%) | 0.129 | 0.018 | 0.114 |
| Preeclampsia, n (%) | 12 (2.1%) | 8 (5.3%) | 0.030 | 0.035 | 0.037 |
| GDM, n (%) | 116 (19.8%) | 33 (21.7%) | 0.607 | 0.454 | 0.464 |
| CS, n (%) | 216 (36.9%) | 64 (42.1%) | 0.241 | 0.096 | 0.092 |
| Preterm delivery, n (%) | 277 (47.4%) | 82 (53.9%) | 0.147 | 0.064 | 0.076 |
| Postpartum hemorrhage, n (%) | 13 (2.2%) | 3 (2.0%) | 0.851 | 0.825 | 0.842 |
| Placenta previa, n (%) | 11 (1.9%) | 5 (3.3%) | 0.288 | 0.307 | 0.344 |
| Placenta abruption, n (%) | 1 (0.2%) | 0 (0%) | 0.610 | 0.676 | 0.658 |
| Dystocia, n (%) | 8 (1.4%) | 3 (2.0%) | 0.583 | 0.605 | 0.607 |
| Low birth weight, n (%) | 25 (4.3%) | 9 (5.9%) | 0.388 | 0.420 | 0.371 |
| Preterm birth, n (%) | 277 (47.4%) | 82 (53.9%) | 0.147 | 0.064 | 0.076 |
| Macrosomia, n (%) | 27 (4.6%) | 6 (3.9%) | 0.723 | 0.773 | 0.804 |
| Fetal distress, n (%) | 15 (2.6%) | 6 (3.9%) | 0.361 | 0.430 | 0.434 |
| Fetal asphyxia, n (%) | 2 (0.3%) | 0 (0%) | 0.270 | — | — |
| Fetal deformities, n (%) | 2 (0.3%) | 0 (0%) | 0.470 | 0.466 | 0.519 |
| Stillbirth, n (%) | 3 (0.5%) | 2 (1.3%) | 0.283 | 0.598 | 0.308 |
| Total adverse maternal outcomes, n (%) | 290 (49.6%) | 85 (55.9%) | 0.163 | 0.078 | 0.093 |
| Total adverse neonatal outcomes, n (%) | 299 (51.1%) | 89 (58.6%) | 0.102 | 0.047 | 0.058 |
a
Non-normal distribution of continuous variables.
P value, not adjusted.
P′ value, adjusted for maternal age, pregestational BMI.
*
P value, adjusted for maternal age, pregestational BMI, gestational age, number of previous pregnancies, number of previous births, primiparity, and gestational weight gain.