Outcome measures
pain
SECONDARY
The primary outcome of this study was the mean induction-to-fetal expulsion interval. Secondary outcomes included the mean dose of misoprostol received, the highest pain intensity in the induction-to-fetal expulsion interval, the frequency of participants requiring blood transfusion, curettage, and the frequency of side effects of misoprostol or EPO. We recorded all secondary outcomes in the case report form (CRF).We measured pain intensity through the Visual Analog Scale (VAS). VAS consists of a 10-cm horizontal line grading from zero to 10. Zero typically represents ‘no pain at all’ whereas 10 signifies ‘worst pain’ imaginable. VAS is one of the most commonly used measures of pain intensity in research, and various studies repeatedly confirmed its reliability [