Table 2 Maternal characteristics of the SGA newborns in this study
| Â | All SGA newborns (n = 723) | SGA newborns with genetic diagnosis (n = 88) | SGA newborns without genetic diagnosis (n = 635) | P value |
|---|---|---|---|---|
Fetal appurtenances information | Â | |||
 Fetal appurtenances abnormality (%) * | 0.42 | |||
  Yes | 267 (38.1) | 35 (42.2) | 232 (37.6) |  |
  No | 433 (61.9) | 48 (57.8) | 385 (62.4) |  |
  NA | 23 | 5 | 18 |  |
 Placental abnormalities (%) |  |  |  | 0.50 |
  Yes | 47 (6.7) | 7 (8.4) | 40 (6.5) |  |
  No | 653 (93.3) | 76 (91.6) | 577 (93.5) |  |
  NA | 23 | 5 | 18 |  |
 Amniotic fluid abnormalities (%) |  |  |  | 0.87 |
  Yes | 197 (28.1) | 24 (28.9) | 173 (28.0) |  |
  No | 503 (71.9) | 59 (71.1) | 444 (72.0) |  |
  NA | 23 | 5 | 18 |  |
 Umbilical cord abnormalities (%) |  |  |  | 0.32 |
  Yes | 71 (10.1) | 11 (13.3) | 60 (9.7) |  |
  No | 629 (89.9) | 72 (86.7) | 557 (90.3) |  |
  NA | 23 | 5 | 18 |  |
Complication of pregnancy | ||||
 Diabetes mellitus (%) |  |  |  | 0.024 |
  Yes | 123 (17.2) | 7 (8.4) | 116 (18.4) |  |
  No | 592 (82.8) | 76 (91.6) | 516 (81.6) |  |
  NA | 8 | 5 | 3 |  |
 Hypertension (%) |  |  |  | <0.001 |
  Yes | 169 (23.6) | 5 (6.0) | 164 (25.9) |  |
  No | 548 (76.4) | 78 (94.0) | 470 (74.1) |  |
  NA | 6 | 5 | 1 |  |
 Thyroid disease (%) |  |  |  | 0.72 |
  Yes | 59 (8.2) | 6 (7.2) | 53 (8.4) |  |
  No | 657 (91.8) | 77 (92.8) | 580 (91.6) |  |
  NA | 7 | 5 | 2 |  |
 Intrahepatic cholestasis (%) |  |  |  | 0.10 |
  Yes | 22 (3.1) | 0 (0) | 22 (3.5) |  |
  No | 694 (96.9) | 83 (100.0) | 611 (96.5) |  |
  NA | 7 | 5 | 2 |  |
 Infection (%) |  |  |  | 0.60 |
  Yes | 72 (10.1) | 7 (8.4) | 65 (10.3) |  |
  No | 644 (89.9) | 76 (91.6) | 568 (89.7) |  |
  NA | 7 | 5 | 2 |  |
Maternal characteristics | ||||
 Maternal age, mean (SD), years old | 30.22 (5.05) | 29.72 (5.69) | 30.28 (4.96) | 0.26 |
 Maternal age >35 years old (%) |  |  |  | 0.47 |
  Yes | 143 (20.1) | 19 (23.2) | 124 (19.7) |  |
  No | 567 (79.9) | 63 (76.8) | 504 (80.3) |  |
  NA | 13 | 6 | 7 |  |
 In vitro fertilization and embryo transfer (IVF-ET) (%) |  |  |  | 0.12 |
  Yes | 85 (11.8) | 79 (6.8) | 6 (12.4) |  |
  No | 638 (88.2) | 556 (93.2) | 82 (87.6) |  |