Comparative Effectiveness Studies Registered in ClinicalTrials.gov.
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Abbreviations: IQR, interquartile range.aPbPhase data applies to 637 drug and device trials.cP = 0.02 for chi-square.dRandomization applies to 610 trails with an active comparator or placebo control.eSample size data available for 1025 trials.fStudy length available for 860 trials.
创建时间：
2015-12-02
