Table 1.
Study population characteristics of nifedipine exposure group and nonexposure group. There was no statistically significant difference in maternal and fetal demographic data between these two groups.
| Nifedipine group (n = 206) | No nifedipine group (n = 122) | |
|---|---|---|
| Maternal | ||
| Age (yr) | 29.4 ± 5.9 | 28.6 ± 5.5 |
| Weight (kg) | 78.7 ± 17.6 | 78.9 ± 19.3 |
| Height (cm) | 165.6 ± 7.5 | 164.5 ± 7.3 |
| Gestational age at procedure (week) | 21.2 ± 2.5 | 21.1 ± 2.5 |
| Gravida | 2 (1–3) | 2 (2-3) |
| Para | 1 (0–2) | 1 (1-2) |
| Surgery time (min) | 64.0 ± 23.7 | 76.4 ± 31.6 |
| Anesthesia time (min) | 98.5 ± 25.6 | 119.2 ± 36.2 |
| Volume of local anesthetic agent given via epidural block (mL) | 20.3 ± 6.3 | 22.6 ± 6.0 |
| Intraoperative intravenous fluid (mL/kg) | 1.68 ± 1.02 | 1.76 ± 1.56 |
| Donor twin | ||
| Gestational age at birth (week) | 30.6 ± 3.8 | 29.9 ± 5.0 |
| Body weight at birth (g) | 1391.7 ± 614.4 | 1347.1 ± 659.5 |
| Recipient twin | ||
| Gestational age at birth (week) | 30.6 ± 3.8 | 29.9 ± 5.0 |
| Body weight at birth (g) | 1625.4 ± 621.8 | 1687.4 ± 674.4 |
Data shown in mean ± SD, median (range), or number (%).