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Table 2 Comparison of quantitative RPR titer results for paired clinician-collected venipuncture and self-collected Tasso samples

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

Participants with positive qualitative RPR Venipuncture sample result Tasso sample result Dilution difference between venipuncture and Tasso samples
A 1:256 1:128  + 1
B 1:16 1:16 0
C 1:8 1:8 0
D 1:16 1:16 0
E 1:4 1:2  + 1
F 1:4 1:4 0
G 1:2 1:4 − 1
H 1:2 1:2 0
I 1:512  > 1:16a N/A
J 1:8 1:16 − 1
  Mean difference = 0 dilutions
  1. N/A unable to calculate
  2. aInsufficient sample to quantitate titer beyond 1:16