Table 3 Coefficients of admission and interval models to predict CS
ADM | 2 h | 4 h | 6 h | ||||
|---|---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 2A | Model 3 | Model 3A | Model 4 | Model 4A | |
(N = 5908) | (N = 1568) | (N = 1611) | (N = 819) | (N = 863) | (N = 322) | (N = 328) | |
Intercept | −4.611 | −5.894 | −5.326 | −0.113 | 0.724 | −9.510 | −4.637 |
Symphysis-fundal height | 0.176 | 0.130 | 0.134 | 0.043 | 0.145 | 0.123 | |
Dilatation | −0.158 | − 0.232 | − 0.257 | − 0.689 | −0.686 | − 0.403 | −0.494 |
Age | 0.002 | 0.005 | 0.036 | 0.035 | 0.060 | 0.020 | |
Maternal height | −0.020 | 0.001 | −0.005 | 0.015 | |||
BMI: Normal | – | – | – | – | – | – | |
BMI: Underweight | −0.150 | − 0.437 | − 0.469 | −0.399 | − 0.683 | −0.263 | |
BMI: Overweight | 0.239 | 0.421 | 0.421 | 0.211 | 0.249 | 0.365 | |
BMI: Obese | 0.337 | 0.302 | 0.464 | 0.458 | 0.577 | 0.433 | |
Mode of onset of labour: Spontaneous | – | – | – | – | |||
Mode of onset of labour: Induced | 0.039 | 0.183 | 0.262 | −0.436 | |||
Parity: Nulliparous | – | – | – | – | – | – | – |
Party: Multiparous without CS | − 1.275 | − 1.086 | −1.184 | − 1.160 | − 1.360 | − 1.270 | − 0.832 |
Parity: Multiparous with CS | 0.868 | 0.729 | 0.905 | 0.138 | 0.425 | 1.077 | 1.637 |
Ischial spines prominent: No | – | – | – | – | – | ||
Ischial spines prominent: Yes | 1.107 | 1.762 | 2.150 | 1.519 | 1.057 | ||
Cervix position: Anterior | – | – | – | – | – | ||
Cervix position: Central | −0.082 | 0.346 | 0.197 | −0.066 | − 0.207 | ||
Cervix position: Posterior | 0.308 | 0.602 | 0.442 | 0.025 | 0.134 | ||
Gestational age: Term | – | – | – | – | – | ||
Gestational age: Pre-term | −0.214 | −0.361 | − 0.682 | −1.136 | 0.048 | ||
Gestational age: Post-term | 0.329 | 0.161 | 1.008 | 0.660 | −0.007 | ||
Foetal presentation: Cephalic anterior | – | ||||||
Foetal presentation: Cephalic transverse | 1.139 | ||||||
Foetal presentation: Cephalic posterior | 0.889 | ||||||
Foetal presentation: Other | 0.688 | ||||||
MHR: 50–100 | – | – | – | – | – | – | |
MHR: 40–49 or 101–110 | 0.156 | 0.041 | 1.441 | 0.914 | 1.377 | 1.427 | |
MHR: < 40 or > 110 | 0.560 | 0.728 | 0.248 | 0.378 | 1.377 | 1.427 | |
SBP: 90–139 | – | – | – | – | – | ||
SBP: 80–89 or 140–149 | −0.020 | 0.253 | 0.078 | 0.441 | −1.190 | −0.106 | |
SBP: 71–79 or 150–159 | 0.356 | 0.321 | 0.603 | −0.340 | 1.928 | 1.241 | |
SBP: <=70 or > =160 | 0.146 | 1.172 | 0.840 | −1.029 | 1.157 | 0.835 | |
Number of contractions observed (10 min) > =3 | – | – | – | – | – | – | |
Number of contractions observed (10 min) < 3 | 0.555 | 0.009 | 0.362 | 0.414 | 0.839 | 0.456 | |
Suspected foetal distress: No | – | – | – | – | – | – | – |
Suspected foetal distress: Yes | 0.657 | 1.207 | 0.790 | 2.509 | 2.121 | 1.683 | 1.187 |
Foetal movements: No | – | – | – | – | – | ||
Foetal movements: Yes | −0.405 | −0.431 | −0.388 | 0.046 | 0.233 | ||
Foetal station: Above the ischial spines | – | – | – | – | – | ||
Foetal station: At or below the ischial spines | − 0.535 | − 0.716 | − 0.441 | − 0.160 | −0.420 | ||
Amniotic membrane: intact | – | – | – | – | – | – | – |
Amniotic membrane: ruptured with meconium | 0.758 | 0.513 | 0.500 | 0.617 | 0.658 | 1.189 | 1.492 |
Amniotic membrane: ruptured without meconium | −0.041 | 1.589 | 1.537 | 1.336 | 1.321 | 1.978 | 2.413 |
Labour pain: No | – | – | – | – | – | ||
Labour pain: Moderate to extreme | −0.178 | 0.118 | 0.583 | 0.447 | 0.346 | ||
Time between admission and 4 cm: < 8 h | – | – | – | – | – | ||
Time between admission and 4 cm: > = 8 h | 0.433 | 0.410 | − 0.321 | 0.668 | 0.529 | ||