| 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 |
[14] Azithromycin, IV (with cefazolin, IV for emergency caesarean delivery): Tita ATN, Boggess K, Saade G. Adjunctive Azithromycin Prophylaxis for Cesarean Delivery. N Engl J Med. 2017 Jan 12;376(2):182. https://www.ncbi.nlm.nih.gov/pubmed/28076707
Azithromycin, IV (with cefazolin, IV for emergency caesarean delivery): Farmer N, Hodgetts-Morton V, Morris RK. Are prophylactic adjunctive macrolides efficacious against caesarean section surgical site infection: A systematic review and meta-analysis. Eur J Obstet Gynecol Reprod Biol. 2020 Jan;244:163-171. https://www.ncbi.nlm.nih.gov/pubmed/31810022