Key result
A systematic review of 18 papers found no consistent pattern of either randomized controlled trials or non-randomized studies giving larger or smaller estimates of treatment effect.
Systematic Review
Non-randomized studies yield comparable effect estimates to RCTs without directional bias; confirms their role in evidence synthesis when trials are limited.
T he overall aim of the NHS R&D Health Technology Assessment (HTA) programme is to ensure that high-quality research information on the costs, effectiveness and broader impact of health technologies is produced in the most efficient way for those who use, manage
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Britton et al. (1998) reported a systematic review. Randomised controlled trials vs. Non-randomised studies was evaluated on Treatment effect size. A systematic review of 18 papers found no consistent pattern of either randomized controlled trials or non-randomized studies giving larger or smaller estimates of treatment effect.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: