Table 1 Baseline and Surgical Characteristics
|  | NE (n = 50) | PE (n = 50) | P value |
|---|---|---|---|
Age, year | 31.6 (4.3) | 31.5 (4.2) | .400 |
Weight, kg | 72.6 (8.0) | 71.0 (11.2) | .415 |
Height, cm | 161 (5.3) | 160 (4.7) | .464 |
Body mass index, kg.m− 2 | 28.0 (2.3) | 27.6 (3.5) | .505 |
Gestation at delivery, week | Â | Â | .913 |
 32+ 0 to 34+ 6 | 8 (16%) | 7 (14%) |  |
 35+ 0 to 36+ 6 | 21 (42%) | 23 (46%) |  |
 37+ 0 to 38+ 6 | 21 (42%) | 20 (40%) |  |
Parity | 1 (0–2) | 1 (0–2) | .437 |
Pregnancy complications a | 23 (46%) | 18 (36%) | .309 |
Block height, dermatome | 6 (4–6) | 6 (4–6) | .060 |
Baseline systolic blood pressure, mmHg | 116 (10) | 118 (8) | .250 |
Baseline heart rate, beats/min | 89 (12) | 87 (12) | .419 |
Time intervals, second | |||
 Spinal injection to skin incision | 1032 (877–1215) | 1069 (750–1261) | .907 |
 Skin incision to delivery of first twin | 247 (204–345) | 230 (184–306) | .272 |
 Interval between two deliveries | 72 (54–108) | 63 (43–105) | .244 |
Blood Loss, ml | 539 (156) | 551 (203) | .741 |
Nausea and vomiting | 2 (4%) | 1 (2%) | 1.000 |
Postoperative length of stay, day | 3 (3–4) | 3 (3–4) | .917 |