Funding Trends for Clinical Trials in ClinicalTrials.gov | Research, Methods, Statistics | JAMA | The JAMA NetworkIn 2005, registration of trials became required for publication in major journals. Registration is also required for trials that meet the definition of an “applicable clinical trial” from the US Food and Drug Administration Amendments Act 801 and that were either initiated after September 27, 2007, or initiated on or before that date and were still ongoing as of December 26, 2007. There are legal repercussions if sponsors or principal investigators do not register accurately. We hypothesized that the number of NIH-funded trials has decreased. We investigated trends in funding of trials using the NIH-built database, ClinicalTrials.gov, with a focus on NIH and industry funding.