Data analysis
Statistical analysis was performed using SPSS, version 21.0 software
(IBM Corp., Armonk, NY). Continuous variables were compared with
Mann-Whitney U-test. Chi-square or Fisher’s exact test was used for
categorical data, as appropriate. Demographics and medical data were
compared between the study and control group using univariate analysis.
Potential confounders and significant variables in the univariate
analysis were entered into multivariable binary regression analysis to
establish their effect on the risk for uterine rupture. A probability
value <0.05 was considered significant.