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. Author manuscript; available in PMC: 2020 Nov 5.
Published in final edited form as: Diagn Microbiol Infect Dis. 2018 Oct 11;93(4):325–328. doi: 10.1016/j.diagmicrobio.2018.10.002

Table 1.

Performance of the INSTI Multiplex HIV-1/HIV-2/Syphilis Antibody Test kit, the INSTI HIV-1/HIV-2 Antibody Test kit and Syphilis Health Check.

HIV antibody detection*
Positive (n=82) Negative (n=192) Sensitivity 95% CI Specificity 95% CI Cohen’s kappa statistic
Multiplex HIV 81 192 98.8% (93.40 – 100%) 100% (98.1–100%) 0.99 (0.97–1)
INSTI HIV 81 192
Treponema pallidum antibody detection**
Positive (n=74) Negative (n=200) Sensitivity 95% CI Specificity 95% CI Cohen’s kappa statistic
Multiplex TP 42 197 56.8% (44.7– 68.2%) 98.5% (95.7–99.7%) 0.63 (0.52–0.74)
Syphilis Healthcheck 54 194 73% (61.4–82.6%) 97% (93.6–98.9%) 0.75 (0.56–0.86)
*

Reference tests: Abbott ARCHITECT HIV Ag/Ab Combo; 4th generation ADVIA Centaur XP HIV-1/O/2 Antigen/Antibody

**

Reference tests: Serodia TPPA, Fujirebio Inc, PA, USA; TPEIA Bioplex 2200, Bio-Rad Industries, CA, USA