Table 1. Clinical characteristics of ICP and control groups.
| Perinatal characteristics | Control (n = 42) | Mild ICP (n = 20) | Severe ICP (n = 20) |
| Maternal Age (years) | 26.5±4.3 | 26.7±4.5 | 27.9±5.3 |
| Maternal weight (kg) | 65.2±8.6 | 68.4±8.9 | 67.2±9.0 |
| Maternal height (cm) | 160.1±3.0 | 160.5±4.5 | 159.6±4.5 |
| Gravidity (times) | 1.4±0.8 | 1.5±0.8 | 1.6±0.7 |
| Antenatal fetal heart rate | 141.2±6.2 | 141.5±3.7 | 140.8±6.3 |
| Weeks gestational (weeks) | 38.7±1.2 | 36.9±2.7** | 35.7±2.4** |
| Birth weight (kg) | 3.38±0.33 | 3.0±0.50** | 2.64±0.52** |
| Fetal complications (%) | 1.2% | 10% | 20%* |
| Spontaneous preterm delivery (%) | 2.4% | 12.5% | 47.5%** |
| Apgar score ≤7 at 5 min (%) | 1.2% | 5% | 15% |
| Fetal distress (%) | 2.4% | 10% | 30%** |
| Meconium-stained amniotic fluid (%) | 4.9% | 17.5% | 32.5%* |
| Fetal demise (%) | N/A | N/A | 5% |
The data are expressed as the mean ± S.D., *p<0.05 vs. control group, **p<0.01 vs. control group. Χ2-test was used to evaluate the comparisons of the rates, *p<0.05 vs. control group, **p<0.01 vs. control group.