Free enrollment risk calculator
How long will it really take to enroll your trial?
Use your own assumptions for sites, screen failure and monthly enrollment. See how many people must be screened and how long recruitment may take if the assumptions are true.
Child-speak: tell us how many patients you need, how many sites will recruit, how many patients each site can truly enroll each month, and how many screened people usually fail. We do the arithmetic.
Your recruitment arithmetic
The dangerous number is often not “patients needed.”
Recruitment depends on how many eligible patients each site can actually enroll under this exact protocol, how many screened patients fail, how long site startup takes, and how burdensome the study is for patients and caregivers. A forecast that assumes every site performs equally is usually more fragile than one built from site-specific evidence.