Table 1 Baseline and obstetric characteristics of the two groups
Variable | PUR group (n = 677) | control group (n = 677) | P value |
|---|---|---|---|
Age (years) | 29.55 (3.12) | 29.23 (3.15) | 0.064 |
Pre-gestational BMI (kg/m2) | 20.74 (2.50) | 20.62 (2.58) | 0.402 |
Weight gain (kg) | 14.35 (4.30) | 14.31 (4.39) | 0.849 |
Gravidity | Â | Â | 0.238 |
 One | 501 (74) | 482 (71.2) |  |
 Two | 147 (21.7) | 153 (22.6) |  |
 Three or more | 29 (4.3) | 42 (6.2) |  |
Gestational age at delivery (weeks) | 39.15 (1.32) | 39.14 (1.28) | 0.890 |
Neonatal birth weight (g) | Â | Â | 0.113 |
  < 3000 | 136 (20.1) | 156 (23.0) |  |
 3000–3499 | 325 (48.0) | 338 (49.9) |  |
  ≥ 3500 | 216 (31.9) | 183 (27.0) |  |
Epidural analgesia | 432 (63.8) | 358 (52.9) | < 0.001 |
Intact perineum | 7 (1.0) | 20 (3.0) | < 0.001 |
 1st degree | 70 (10.3) | 197 (29.1) |  |
 2nd degree | 296 (43.7) | 290 (42.8) |  |
 Episiotomy | 304 (44.9) | 170 (25.1) |  |
Forceps delivery | 138 (19.9) | 40 (5.9) | < 0.001 |
Duration first stage (min) | Â | Â | 0.001 |
  < 360 | 251 (37.1) | 319 (47.1) |  |
 360–719 | 347 (51.2) | 295 (43.6) |  |
  ≥ 720 | 79 (11.7) | 63 (9.3) |  |
Duration second stage (min) |  |  | < 0.001 |
  < 60 | 381 (56.3) | 461 (68.1) |  |
 60–179 | 282 (41.6) | 210 (30.0) |  |
  ≥ 180 | 14 (2.1) | 6 (0.9) |  |
Intrauterine operation | 64 (9.4) | 83 (12.3) | 0.097 |
Vulvar edema | 189 (27.9) | 33 (4.9) | < 0.001 |