Candidate predictors of cesarean delivery
Univariable analyses revealed the
following variables were significantly associated with the probability
of caesarean delivery: maternal height, BMI before labor, induction of
labor, bilateral femoral head distance, interspinous diameter, obstetric
conjugate, subpubic angle, fetal biparietal diameter,
fetal head circumference and fetal
abdominal circumference (Table 2).
Subsequent backward stepwise
multivariable logistics analysis identified maternal BMI
before labor (OR, 1.307; 95% CI,
1.109-1.541; P = 0.001), induction (OR, 2.777; 95% CI,
1.190-6.478; P = 0.018), bilateral femoral head distance (OR,
0.898; 95% CI, 0.838-0.963; P = 0.003), obstetric conjugate (OR,
0.951; 95% CI, 0.907-0.997; P = 0.038), fetal head circumference
(OR, 1.786; 95% CI, 1.152-2.770; P = 0.01) and fetal abdominal
circumference (OR, 1.685; 95% CI, 1.221-2.325; P = 0.001) as
independent predictors for the risk of cesarean delivery (Table 3).