A description of each primary outcome measure (or for observational studies, specific key measurement[s] or observation[s] used to describe patterns of diseases or traits or associations with exposures, risk factors or treatment). Each primary outcome measure information includes title, description and time frame.

https://prsinfo.clinicaltrials.gov/definitions.html

primary end point

primary outcome(s)

https://clinicaltrials.gov/ct2/about-studies/glossary