Feasibility of a novel self-collection method for blood samples and its acceptability for future home-based PrEP monitoring

Table 3 Proportion of PrEP Monitoring Samples Successfully Tested by Number of Self-Collection Attempts

Number of collections attempted using Tasso device	PrEP monitoring tests completed^a
Number of collections attempted using Tasso device	0	1	2	3
1 (n = 21)	6 (28.6%)^b	11 (52.4%)	4 (19.0%)	0
2 (n = 27)	0	3 (11.1%)	15 (55.6%)	9 (33.3%)
Overall (n = 48)	6 (12.5%)	14 (29.2)	19 (39.6)	9 (18.8%)

^aTests included serum HIV antigen–antibody, rapid plasma reagin and creatinine
^bOf 5 participants with insufficient sample to complete at least one PrEP lab test: 3 reported methamphetamine or heavy alcohol use in the last 8 h, 1 reported history of “quick clotting,” 1 insufficient volume after centrifugation. One specimen could not be analyzed due to a laboratory processing error

ISSN: 1471-2334