Table 2 Characteristics of analgesia, labor and newborn outcome
|  | CON (n = 30) | IND (n = 30) | Z/t/x2 | P value |
|---|---|---|---|---|
Onset of analgesia (min) | 10.0 (8.5–11.5) | 6.0 (4.9–7.1) | 8.532 | 0.003 |
VAS during epidural puncture | 3.5 (3.3–4.5) | 2.0 (1.8–2.5) | -4.892 | 0.000 |
Consumption of ropivacaine (mg) | 54.8 ± 24.4 | 40.9 ± 25.4 | 2.153 | 0.036 |
Consumption of sufentanil (μg) | 27.4 ± 12.2 | 20.5 ± 12.7 | 2.153 | 0.036 |
Number of total PCEA boluses (n) | 2.0 (1.3–2.6) | 1.0 (0.6–1.3) | -2.540 | 0.011 |
Maternal satisfaction (n, %) | 9.0 (8.2–8.9) | 9.0 (9.1–9.5) | -3.261 | 0.001 |
Failed to reach onset of analgesia (n, %) | 6 (20.0) | 2 (6.7) | 1.298 | 0.255 |
Duration of first stage (min) | 420.0 (397.1–577.8) | 360.0 (365.3–541.9) | -0.632 | 0.528 |
Duration of second stage (min) | 37.0 (32.7–55.4) | 39.0 (34.0–61.8) | -0.240 | 0.811 |
Mode of delivery (n, %) | Â | Â | 0.000 | 1.000 |
 Vaginal | 29 (96.7) | 28 (93.3) |  |  |
 Cesarean delivery | 1 (3.3) | 2 (6.7) |  |  |
Postpartum bleeding (ml) | 150 (139.9–445.5) | 150 (157.3–207.4) | -0.456 | 0.649 |
Neonatal Apgar score | ||||
 1 min | 9.0 (8.8–9.1) | 9.0 (8.8–9.1) | -0.023 | 0.982 |
 5 min | 10.0 (9.8–10.0) | 10.0 (9.8–10.0) | -0.463 | 0.643 |
Umbilical artery PH | 7.3 ± 0.1 | 7.3 ± 0.0 | -0.533 | 0.596 |
Umbilical artery PaO2 (mmHg) | 32.6 ± 4.3 | 33.7 ± 4.1 | -0.994 | 0.324 |
Umbilical artery Lac (mmol/L) | 2.7 ± 0.6 | 2.6 ± 0.7 | 0.381 | 0.705 |