Search strategy and study inclusion

We conducted this systematic review in accordance with the Cochrane Handbook for Systematic Reviews of Interventions.¹⁵ We conducted a structured search of the English-language literature in MEDLINE Ovid (1946 to Oct. 19, 2020), Embase Ovid (1974 to Oct. 19, 2020) and CENTRAL Ovid (2018 to Oct. 19, 2020). The complete search strategy is presented in Appendix 1 (available at www.cmajopen.ca/content/9/2/E642/suppl/DC1).

We searched for observational studies and RCTs that compared home and office blood pressure measurements during the antepartum period. We excluded studies published in a language other than English, those published only as abstracts and those that did not compare home and office blood pressure measurements. The structured search was created by M.-D.W., a health research information specialist with systematic review experience.

We downloaded records from the database searches and imported them into an EndNote library to facilitate removal of duplicates and screening. Two of the authors (K.T., W.S.C.), working independently and in duplicate, assessed the records identified by the search strategy for inclusion, resolving any disagreements by discussion.