Statistical methods
POSTPARTUM HEMORRHAGE
In this study, continuous variables are presented as mean ± standard deviation (SD) and median [interquartile range (IQR)] and categorical variables as frequency (percentage). The distribution of postpartum hemorrhage score was assessed with Kolmogorov–Smirnov and Shapiro–Wilk tests. Because of the non-normal distribution of the data, a comparison between the two groups was done with the Mann–Whitney test with the Hodges–Lehmann estimator and corresponding exact conditional nonparametric confidence interval (CI) as effect estimate. Data analysis was done with SPSS for Windows, version 16.0 (SPSS Inc., Chicago, IL, USA) and MedCalc version 19.5.3 (MedCalc Software, Ostend, Belgium). A 