Treatment effects in randomised trials using routinely collected data for outcome assessment versus traditional trials: meta-research study.
Kimberly A Mc CordHannah EwaldArnav AgarwalDominik GlinzSoheila AghlmandiJohn P A IoannidisLars G HemkensPublished in: BMJ (Clinical research ed.) (2021)
Randomised clinical trials using routinely collected data for outcome ascertainment show smaller treatment benefits than traditional trials not using routinely collected data. These differences could have implications for healthcare decision making and the application of real world evidence.