The unpredictability paradox: review of empirical comparisons of randomised and non-randomised clinical trials

Objective To summarise comparisons of randomised clinical trials and non-randomised clinical trials, trials with adequately concealed random allocation versus inadequately concealed random allocation, and high quality trials versus low quality trials where the effect of randomisation could not be se...

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Veröffentlicht in:	BMJ 1998-10, Vol.317 (7167), p.1185-1190
Hauptverfasser:	Kunz, Regina, Oxman, Andrew D
Format:	Artikel
Sprache:	eng
Schlagworte:	Clinical trials Clinical Trials as Topic - methods Clinical Trials as Topic - standards Control groups Data Collection Experimentation Health outcomes Hematocrit Mortality Observational studies Quality Control Random Allocation Randomized controlled trials Randomized Controlled Trials as Topic - methods Randomized Controlled Trials as Topic - standards Scientific method Selection Bias
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