Table 5.

Reason for prescreen fail by race

	American Indian or Alaskan Native	Asian	Black or African American	Caucasian or White	Other	Unknown or not reported	Hawaiian or other Pacific Islander	Total
No longer interested—concerns about burden/duration	1 (100%)	1 (10.0%)	3 (17.6%)	65 (25.4%)	1 (20.0%)	7 (18.0%)	0 (0.0%)	78 (23.9%)
No study partner	0 (0.0%)	1 (10.0%)	1 (5.9%)	7 (2.7%)	1 (20.0%)	0 (0%)	0 (0.0%)	9 (2.8%)
MCI/AD diagnosis	0 (0.0%)	0 (0.0%)	0 (0%)	8 (3.1%)	0 (0.0%)	0 (0%)	0 (0.0%)	8 (2.5%)
Medical exclusion (other than MCI/AD diagnosis)	0 (0.0%)	1 (10.0%)	3 (17.7%)	44 (17.2%)	0 (0.0%)	2 (5.1%)	1 (100.0%)	51 (15.6%)
No longer interested—concerns regarding investigational treatment	0 (0.0%)	0 (0.0%)	0 (0.0%)	10 (3.9%)	0 (0.0%)	2 (5.1%)	0 (0.0%)	12 (3.7%)
No longer interested—concerns regarding radiation	0 (0.0%)	0 (0.0%)	0 (0.0%)	3 (1.2%)	0 (0.0%)	0 (0%)	0 (0.0%)	3 (0.9%)
Contraindications to MRI scanning	0 (0.0%)	0 (0.0%)	2 (11.8%)	8 (3.1%)	0 (0.0%)	1 (2.6%)	0 (0.0%)	11 (3.4%)
Other	0 (0.0%)	7 (70.0%)	8 (47.1%)	121 (47.3%)	4 (80.0%)	28 (71.8%)	0 (00%)	167 (51.1%)

Participants can have more than one reason for prescreen fail and race; the sum (%) may exceed 100% or total number of participants, respectively