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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: AIDS Behav. 2014 May;18(5):820–825. doi: 10.1007/s10461-014-0749-4

Table 3.

Validation of VIREA using detectable tenofovir concentrations in vaginal fluid at matching study visits

VIREA outcome Tenofovir detected in vaginal fluid
No Yes Total study visits
≤50% ‘appeared used’ 32 (86.5%) 5(13.5%) 37
>50% ‘appeared used’ 141(41.7%) 197 (58.3%) 338
Total 173 202 375

Fisher’s exact p<0.0001