Table 1 Baseline characteristics of pregnant women participating in our cohort by HG exposure status
From: Hyperemesis gravidarum and placental dysfunction disorders
| Â | HG exposure | P | ||
|---|---|---|---|---|
No HG (n = 1833) | Mild HG (n = 354) | Severe HG (n = 46) | ||
Demographic characteristics | ||||
Age (years) Median (IQR) | 28.09 (8.7) | 28.13 (7.4) | 28.36 (9.1) | 0.62 |
Women’s educationa | 0.15 | |||
 Low | 413 (22.6) | 73 (20.6) | 10 (22.2) | |
 Intermediate | 1123 (61.4) | 208 (58.8) | 31 (68.9) | |
 High | 292 (16.0) | 73 (20.6) | 4 (8.9) | |
Partner’s educationa | 0.23 | |||
 Low | 323 (17.7) | 46 (13.0) | 9 (20.0) | |
 Intermediate | 1199 (65.6) | 241 (68.1) | 30 (66.7) | |
 High | 305 (16.7) | 67 (18.9) | 6 (13.3) | |
Family incomeb | Â | Â | Â | 0.01* |
  < 72 USD | 197 (10.8) | 26 (7.3) | 5 (10.9) | |
 72–180 USD | 799 (43.6) | 169 (47.7) | 18 (39.1) | |
 180–360 USD | 529 (28.9) | 126 (35.6) | 16 (34.8) | |
  > 360 USD | 124 (6.8) | 17 (4.8) | 3 (6.5) | |
 Refused to answer | 182 (9.9) | 16 (4.5) | 4 (8.7) | |
Health characteristics | ||||
Pre-pregnancy BMI Median (IQR) | 22.0 (5.5) | 22.2 (5.5) | 23.2 (6.6) | 0.59 |
Chronic hypertension | 27 (1.5) | 5 (1.4) | 0 | 0.71 |
Type 2 diabetes | 11 (0.6) | 2 (0.6) | 0 | 0.87 |
Partner’s smoking status | 0.12 | |||
 Smokes daily | 394 (48.6) | 70 (50.7) | 8 (36.4) | |
 Smokes occasionally | 113 (13.9) | 12 (8.7) | 1 (4.5) | |
 Doesn’t smoke | 304 (37.5) | 56 (40.6) | 13 (59.1) | |
Obstetrics characteristics | ||||
Primigravida | 480 (38.0) | 112 (41.5) | 12 (34.3) | 0.50 |
Gestational age (weeks) at first visit Median (IQR) | 16 (20) | 9 (4.50) | 10 (5.0) | 0.00* |
Reported complications in previous pregnancy | Â | |||
 No | 1070 (84.6) | 233 (86.0) | 29 (82.9) | 0.80 |
 IUGR/SGA | 3 (0.2) | 0 | 0 | 0.70 |
 Hypertensive disorder in pregnancy | 44 (2.4) | 11 (3.1) | 1 (2.2) | 0.74 |
 Miscarriage | 136 (7.4) | 28 (7.9) | 2 (4.3) | 0.69 |
Female baby | 651 (46) | 133 (46.5) | 22 (59.5) | 0.27 |
Multiple pregnancy | 27 (1.9) | 1 (0.4) | 0 | 0.12 |
Mode of delivery | 0.08 | |||
 Vaginal | 871 (61.3) | 168 (58.9) | 24 (64.9) | |
 Instrumental | 33 (3.1) | 11 (3.9) | 4 (10.8) | |
 Caesarean section | 506 (35.6) | 106 (37.2) | 9 (24.3) | |