Outcome Selection Bias In Meta Analysis. Publication bias has been previously identified as a threat to the validity of a meta-analysis. Study publication bias and outcome reporting bias have been recognised as a potential threat to the validity of meta-analysis and can make the readily available evidence unreliable for decision.
It is sometimes referred to as the selection effect. Publication bias has been previously identified as a threat to the validity of a meta-analysis. The withinstudy selective reporting of outcomes defined as the selection of a subset of the original variables recorded for inclusion in publication of trials can theoretically have a substantial impact on the results.
If the selection bias is not taken into acco.
Some articles might report only a selection of those outcomes perhaps those with statistically. Some articles might report only a selection of those outcomes perhaps those with statistically. A potentially bigger threat to the validity of a metaanalysis appears relatively unnoticed. Recently new evidence has documented an additional threat to validity the selective reporting of trial outcomes within published studies.