Reported Methodologic Quality and Discrepancies between Large and Small Randomized Trials in Meta-Analyses

Lise Lotte Kjaergard; John Villumsen; Christian Gluud

doi:10.7326/0003-4819-135-11-200112040-00010

December 4, 2001Annals of Internal Medicine

Reported Methodologic Quality and Discrepancies between Large and Small Randomized Trials in Meta-Analyses

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Key Points

To examine whether flaws in trial design—specifically allocation sequence generation, allocation concealment, and double blinding—bias treatment effect estimates and explain discrepancies between small and large randomized trials in meta-analyses.
Assessed reported methodological quality parameters, including allocation sequence generation, allocation concealment, and double-blinding procedures.
Analyzed the relationship between trial methodological quality indicators and effect size discrepancies between large and small randomized trials within meta-analyses.
Inadequate generation of allocation sequences and poor allocation concealment lead to exaggerated estimates of intervention benefit.
Lack of double blinding significantly overstates intervention efficacy, directly contributing to discordant conclusions between small and large randomized trials in meta-analyses.

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Implication

Methodological analysis reveals trial quality flaws exaggerate intervention benefits across clinical meta-analyses, highlighting drivers of discrepancy between trial sizes.

Abstract

Inadequate generation of the allocation sequence, allocation concealment, and double blinding lead to exaggerated estimates of intervention benefit and may contribute to discrepancies between the results of large randomized trials and small randomized trials in meta-analyses.

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Kjaergard et al. (2001) studied this question.

synapsesocial.com/papers/69df8a5dde200760a8615325 https://doi.org/10.7326/0003-4819-135-11-200112040-00010

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Reported Methodologic Quality and Discrepancies between Large and Small Randomized Trials in Meta-Analyses

Key Points

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Implication

Abstract

Discussion

Cite This Study

Reported Methodologic Quality and Discrepancies between Large and Small Randomized Trials in Meta-Analyses

Key Points

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Implication

Abstract

Discussion

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