Table 2. Summary of results for the quality of evidence according to the GRADE system.

Outcome	Group effect (95%CI)	Participants (number of studies)	Quality of evidence (GRADE) ¹⁶
Postpartum infection	2.83 (1.58–5.06)	466,739 (4)	Moderate^a
Hemorrhage	0.52 (0.48–0.57)	236,793 (3)	Low
Maternal death	3.10 (1.92–5.00)	257,640 (2)	Moderate^a
Blood transfusion	1.57 (0.88–2.81)	682,271 (5)	Very low^b

GRADE: Grading of Recommendations Assessment, Development, and Evaluation

^a Low level (observational studies) + consistent findings (1 level).

^b Low level (observational studies) - inconsistent findings (1 level).