Table 2. Baseline characteristics of the study population.
| Study population | |||
|---|---|---|---|
| Demographic characteristics | Responders (n = 377) | Non-responders (n = 128) | P-value |
| Maternal age, mean (SD) | 31.2 years (4.55) | 30.7 (5.35) | 0.36 |
| Gestational age, median (IQR) | 284 (275;291) | 284 (276;291) | 0.89 |
| Nulliparous, n(%) | 258 (68%) | 84 (66%) | 0.56 |
| Vaginal delivery, n(%) | 280 (75%)* | 89 (72%)** | 0.44 |
| Instrumental delivery, n(%) | 38(10%) | 12 (10%) | 0.86 |
| Caesarean section, n(%) | 54 (15%) | 23 (18%) | 0.28 |
| BMI, median (IQR) | 25.2 (22.3;29.7)** | 24.7 (22.6;29.0)** | 0.93 |
| Epidural use | 218 (57.8%)*** | 85 (66.4%)*** | 0.04 |
| PPH > 500 ml | 165 (43.8%) | 61 (47.6%) | 0.09 |
| Labour duration > 12 hours | 102 (36%) | 46 (35.9%) | 0.06 |
| Umbilical pH<7.1 | 19 (5.0%) | 3 (2.3%) | 0.19 |
| Apgar score <7 at 5 minutes | 1 (0.27%) | 2 (1.1%) | 0.10 |
| Perineal tear III or IV | 15 (4.0%) | 6 (4.7%) | 0.19 |
* 5 missing values
** 4 missing values
*** 2 missing values