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First Posted—Specify a From date to find studies available on ClinicalTrials.gov on or after that date. Specify a To date to find studies available on or before that date. Specify both From and To dates to find studies that were available on ClinicalTrials.gov during a certain time period. If no dates are entered, all studies will be included in your search results.
Dates should be entered in MM/DD/YYYY format. For example, March 1, 2010, is entered as "03/01/2010."
The First Posted date is the date on which the study record was first available on ClinicalTrials.gov. There is typically a delay of a few days between when the study record was submitted to ClinicalTrials.gov by the study sponsor or investigator (First Submitted date) and the First Posted date.