Table 2.

Characteristics of the completed and published systematic reviews (SRs) [19].

SR task	SR task description	Value, n
Run the SR	Databases searched	4
Run the SR	Trial registries searched	2
Deduplicate the search results	Records to be deduplicated	717
Deduplicate the search results	Records left after deduplication	586
Screen the titles and abstracts	Studies to screen	586
Find the full text	Full texts required	40
Screen the full text	Full texts for screening	40
Extract the data	Full-text articles extracted (ie, characteristics of studies and outcomes)	16
Assess the risk of bias	Full-text articles requiring risk-of-bias assessment	16
Write the results	Full-text articles qualitatively synthesized	16
Conduct a meta-analysis	Full-text articles meta-analyzed	10