Table 2 Percentage of overviews (published up to 2016 or 2017) reporting on key aspects of methods and results
Reporting item | Percentage of overviews reporting the item (%) |
|---|---|
Indicate that they are working from a protocol [4] | 22 |
Rationale [4] | 60 |
Explicit statement of objectives [4] | 56 |
PICO criteria for eligibility [4] | 44 |
Primary outcome [28] | 29 |
Databases and search dates [28] | 74 |
Full search strategy [4] | 36 |
Circumstances in which primary studies would be considered [4] | 6 |
Description of methods used for all steps of screening [28] | 69 |
Description of methods used for data extraction [28] | 67 |
Description of methods used to assess quality or risk of bias [28] | 78 |
Description of methods for addressing overlapping SRs in overviews [4] | 44 |
Description of methods for addressing discordant SRs [4, 28] | 4–6 |
Description of the synthesis methods | 26 |
Description of included SRs (adequate detail to be replicable) [4] | 20 |
Methodological quality of included SRs [4] | 76 |
Methodological quality of primary studies contained within included SRs [4] | 22 |
Certainty of evidence of outcome data [4] | 34 |
Conflicts of interest statement [28] | 82 |
Source of funding [28] | 74 |