|
Bivariate analysis |
Bivariate analysis |
Multivariate analysis |
Multivariate analysis |
Multivariate analysis |
|
OR [95 % CI] |
p - value |
OR [95 %
CI] |
p - value |
p - value |
Maternal body mass index (kg/m²) |
|
0.11 |
|
|
|
< 25 |
1 |
|
|
|
|
≥ 25 |
1.29 [0.94 - 1.77] |
|
|
|
|
Maternal body mass index (kg/m²) |
|
0.017 |
|
|
|
< 30 |
1 |
|
|
|
|
≥ 30 |
1.66 [1.10 - 2.51] |
|
|
|
|
Maternal height (m) |
|
0.0038 |
|
< 0.001 |
< 0.001 |
≤ 1.54 |
2.61 [1.47 - 4.62] |
|
2.92 [1.56 - 5.49] |
|
|
1.55 – 1.64 |
0.98 [0.70 - 1.37] |
|
0.82 [0.57 - 1.20] |
|
|
1.65 – 1.74 |
1 |
|
1 |
|
|
≥ 1.75 |
0.69 [0.30 - 1.59] |
|
0.61 [0.25 - 1.51] |
|
|
Number of previous vaginal deliveries |
|
0.51 |
|
|
|
0 |
1 |
|
|
|
|
1 |
0.92 [0.57 - 1.49] |
|
|
|
|
≥ 2 |
1.45 [0.74 - 2.82] |
|
|
|
|
Number of previous caesarean sections |
|
0.65 |
|
|
|
0 |
1 |
|
|
|
|
≥ 1 |
0.90 [0.56 - 1.44] |
|
|
|
|
Fundal height (cm) |
|
< 0.001 |
|
|
|
≤ 33 |
1 |
|
|
|
|
> 33 |
1.81 [1.32 - 2.48] |
|
|
|
|
Ratio of fundal height to maternal height (m/m) |
|
< 0.001 |
|
|
|
≤ 0.20 |
1 |
|
|
|
|
> 0.20 |
2.05 [1.49 - 2.83] |
|
|
|
|
Term (weeks of gestation) |
|
0.039 |
|
|
|
< 41 |
1 |
|
|
|
|
≥ 41 |
1.40 [1.02 - 1.93] |
|
|
|
|
Term (weeks of gestation) |
|
0.0050 |
|
0.032 |
0.032 |
< 42 |
1 |
|
1 |
|
|
≥ 42 |
2.16 [1.26 - 3.70] |
|
1.96 [1.06 - 3.62] |
|
|
Duration from 5 cm to complete cervical dilation (h) |
|
0.013 |
|
0.0091 |
0.0091 |
< 3 |
1 |
|
1 |
|
|
≥ 3 |
1.60 [1.11 - 2.32] |
|
1.72 [1.15 - 2.59] |
|
|
Duration at complete cervical dilation (min) |
|
0.046 |
|
|
|
0 - 60 |
1 |
|
|
|
|
61 - 120 |
0.55 [0.32 - 0.92] |
|
|
|
|
121 - 180 |
0.63 [0.42 - 0.94] |
|
|
|
|
≥ 181 |
0.71 [0.46 - 1.11] |
|
|
|
|
Duration of expulsive efforts (min) |
|
0.0012 |
|
0.0013 |
0.0013 |
0 - 10 |
1 |
|
1 |
|
|
11 - 20 |
1.07 [0.74 - 1.54] |
|
1.27 [0.84 - 1.93] |
|
|
21 - 30 |
0.49 [0.32 - 0.74] |
|
0.52 [0.32 - 0.84] |
|
|
≥ 31 |
0.91 [0.39 - 2.17] |
|
1.30 [0.51 - 3.33] |
|
|
Head - perineum distance (mm) |
|
< 0.001 |
|
< 0.001 |
<
0.001 |
40 - 50 |
1 |
|
1 |
|
|
51 - 60 |
1.58 [1.10 - 2.27] |
|
1.60 [1.08 - 2.36] |
|
|
≥ 61 |
7.73 [4.76 - 12.56] |
|
6.66 [3.82 - 11.64] |
|
|
Fetal head position |
|
< 0.001 |
|
0.041 |
0.041 |
- occiput-anterior |
1 |
|
1 |
|
|
- occiput-posterior or occiput-transverse |
1.79 [1.27 - 2.52] |
|
1.48 [1.02 - 2.16] |
|
|
Caput succedaneum |
|
0.0012 |
|
< 0.001 |
< 0.001 |
- absent or insignificant |
1 |
|
1 |
|
|
- medium-sized |
1.65 [0.88 - 3.08] |
|
1.68 [0.85 - 3.33] |
|
|
- bulky |
3.37 [1.68 - 6.76] |
|
4.19 [1.95 - 9.03] |
|
|
Onset of labour |
|
0.018 |
|
|
|
- spontaneous |
1 |
|
|
|
|
- induced |
1.52 [1.07 - 2.14] |
|
|
|
|
Indication of vacuum-assisted delivery |
|
0.35 |
|
|
|
- dystocia/other |
1 |
|
|
|
|
- fetal distress |
1.16 [0.85 - 1.59] |
|
|
|
|