Overview authors rarely defined systematic reviews that are included in their overviews

Ref ID 367
First Author C. M. Faggion Jr
Year Of Publishing 2019
URL https://pubmed.ncbi.nlm.nih.gov/30684566/
Keywords General medical
Low reporting quality
Overviews/Umbrella Reviews
Problem(s) Lack of guidance or consistency in systematic overview / umbrella / review of systematic reviews
Individual study characteristics not reported sufficiently
Intervention not described / defined
Number of systematic reviews included 105
Summary of Findings Only 8% of overviews explicitly reported a systematic review definition, whereas 24% of overviews reported heterogeneous information about the criteria that were used to include systematic reviews in the overviews. 68% of overviews did not report any definition/criteria for including a systematic review. 2% of overviews reported a definition based on reproducibility, and none of the overviews reported the need to search for grey and unpublished literature for a review to be considered systematic.
Did the article find that the problem(s) led to qualitative changes in interpretation of the results? Not Applicable
Are the methods of the article described in enough detail to replicate the study? Yes