Confirm first
- That the site is identifiable and legitimate
- That the study appears relevant to your situation
- That the visit schedule is at least plausibly workable
- That there is a real screening pathway and contact person
A practical sequence for deciding when to share more detailed personal health information.
Last updated: February 27, 2026
General pre-screen questions may be appropriate early. More detailed health history is better reserved for a legitimate screening process, where the study, site, and procedures are already reasonably clear.