| Level I | Good quality evidence |
Systematic review of RCTs with consistent findings High quality individual RCT |
| Level II |
Limited quality patient orientated evidence |
Systematic review of lower quality studies or studies with inconsistent findings Low quality clinical trial Cohort studies Case-control studies |
| Level III | Other |
Consensus guidelines, extrapolations from bench research, usual practice, opinion, disease-oriented evidence (intermediate or physiologic outcomes only), or case series |
[32] Extra-amniotic Foley catheter: PLUS prostaglandin protocol: Al-Ibraheemi Z, Brustman L, Bimson BE, Porat N, Rosenn B. Misoprostol With Foley Bulb Compared With Misoprostol Alone for Cervical Ripening: A Randomized Controlled Trial. Obstet Gynecol. 2018 Jan;131(1):23-29. https://www.ncbi.nlm.nih.gov/pubmed/29215514
Extra-amniotic Foley catheter: PLUS prostaglandin protocol: Osoti A, Kibii DK, Tong TMK, Maranga I. Effect of extra-amniotic Foley's catheter and vaginal misoprostol versus vaginal misoprostol alone on cervical ripening and induction of labor in Kenya, a randomized controlled trial. BMC Pregnancy Childbirth. 2018 Jul 12;18(1):300. https://www.ncbi.nlm.nih.gov/pubmed/30001195
Extra-amniotic Foley catheter: PLUS prostaglandin protocol: World Health Organisation. WHO recommendations for induction of labour, Clinical Practice Guideline, 2011. https://www.who.int/reproductivehealth/publications/maternal_perinatal_health/9789241501156/en/