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Table 1 Arguments for and against including conference abstracts in systematic reviews

From: How should systematic reviewers handle conference abstracts? A view from the trenches

Comprehensiveness increasedResources may be inadequate for locating relevant conference abstracts
Potential for impact of publication bias decreasedAbstracts may not contain adequate information for systematic reviewers to appraise the design, methods, risk of bias, outcomes, and results of studies reported in the abstracts
Increased information leads to increased precisionDependability of results presented in abstracts is questionable