Background: Evidence has shown significant benefits of aspirin for preventing pre-eclampsia.
Objectives: The objective of this study was to systematically review recommendations from clinical practice guidelines and other recommendation documents on aspirin for the prevention of pre-eclampsia.
Search strategy: Ten databases were searched for statements from December 1, 2013, to January 1, 2022.
Selection criteria: Without language restrictions, the most recent version of documents was considered.
Data collection and analysis: Two authors independently extracted recommendations. Guideline quality was assessed using a modified AGREE-II instrument and the AGREE-REX tool.
Main results: Out of 48 statements on the prevention of pre-eclampsia, 46 had recommendations on use of aspirin. Of them, 39 were supported by evidence from systematic reviews or randomized controlled trials. Three statements reported aspirin's significant reductions in preterm pre-eclampsia and one in perinatal death. Concerning quality, 41% of statements were rated as high quality in all domains of the AGREE-II tool, 15% were rated high quality in all domains of the AGREE-REX tool, and 11% were rated high quality in all domains on both tools.
Conclusions: While 96% of statements advocated for use of aspirin, only 9% reported a significant reduction in preterm pre-eclampsia or perinatal death. Based on the AGREE tools, future statements could use methodological improvement.
Keywords: aspirin; pre-eclampsia; pregnancy-induced hypertension; systematic review.
© 2022 International Federation of Gynecology and Obstetrics.