Adoption of peer review of literature search strategies in knowledge synthesis from 2009 to 2018: An overview

Background Knowledge synthesis (KS) reviews rely on good quality literature searches to capture a complete set of relevant studies, and peer review of the search strategy is one quality control mechanism that contributes to better quality reviews. Guidelines for peer review of electronic search strategies (PRESS) have been available since 2008. Objectives This overview provides a snapshot of KS indexed in Scopus, published between 2009 and 2018, that reported peer review of the literature search strategy. Methods Articles were identified through citation chasing for PRESS guidance documents and supplementary keyword searches. The characteristics of individual articles and the journals that published them were documented, and descriptive statistics were compiled. Results 415 articles from 169 journals met inclusion criteria. Approximately half were published in 14 journal titles. Most reviews reported the involvement of an information professional, but PRESS reviewers were rarely acknowledged. An overwhelming majority of review teams were based in Canada. Discussion Reported use of PRESS was low during the period examined, but under‐reporting may be a factor. Investigation of the barriers and facilitators of PRESS adoption is needed. Conclusion Despite its value, adoption of PRESS appears low. Advocacy for, and education about, PRESS may be required.