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Table 3 Summary table: amount of outcome data included in each overview when comparing different inclusion scenarios

From: The impact of different inclusion decisions on the comprehensiveness and complexity of overviews of reviews of healthcare interventions

  Full scenario vs. restricted scenario 1 Restricted scenario 2 vs. 1 Restricted scenario 2 vs. 3 Restricted scenario 2 vs. 4 Restricted scenario 4 vs. 3
Overviews for which Cochrane SRs examined all relevant intervention comparisons
 Bronchiolitis More Same Same Same Same
 Croup Same Same Same Same Same
 Gastroenteritis More Same More Same More
Overviews for which Cochrane SRs did not examine all relevant intervention comparisons
 Acute asthma More More More Same More
 Acute otitis media More More Similar Unknown Unknown
 Eczema More More More Unknown Unknown
 Procedural sedation More Unknown Unknown Unknown Unknown
  1. Full scenario: include all Cochrane and non-Cochrane SRs; restricted scenario 1: include only Cochrane SRs; restricted scenarios 2–4: include all non-overlapping SRs, and in the case of overlapping SRs include the Cochrane SR (restricted scenario 2), the most recent SR (restricted scenario 3), or the highest quality SR (restricted scenario 4). “More” means that more outcome data were included in the first-listed vs. second-listed scenario; “same” means that the same amount of outcome data were included in both scenarios; “similar” means that the same amount of outcome data were included in both scenarios, but the breakdowns differed across primary, secondary, and adverse effects outcomes; “unknown” means that we were unable to calculate the amount of outcome data