The Inclusion of Economic Endpoints as Outcomes in Clinical Trials Reported to ClinicalTrials.gov.BACKGROUND
 (a) describe the prevalence of economic endpoints in clinical trials submitted to ClinicalTrials.gov and  This retrospective review of ClinicalTrials.gov data extracted the characteristics of clinical trials that were submitted to ClinicalTrials.gov from January 2004 to December 2018; studied a drug and/or biological; and had a recruitment status of not yet recruiting, recruiting, active but not recruiting, or completed. 
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