Most systematic reviews that used the term "update" in title/abstract were not an updated version.

Objectives: To analyze whether articles labelled as systematic reviews or meta-analyses (SRs/MAs) in the title and used terms "updated" or "update" in the title or abstract are indeed a report of an updated version of a previously existing SR/MA.

Study Design And Setting: We searched PubMed for SRs/MAs, using descriptors updated/update in the title/abstract published in 2018-2019. We analyzed how the articles used the term "update"/"updated" and whether the previous version of SR was referenced.