Table 1.
Rapid test results for qualitative detection of semen biomarkers in vaginal swab specimens eluted into phosphate-buffered saline
| PSA detected with ABAcard |
Sg detected with RSID |
|||||
|---|---|---|---|---|---|---|
| Qualitative semen resulta | PSA concentration (ng/mL)b | Total | Number positive (%, 95% CI) | Totalc | Number positive (%, 95% CI) | p-valued |
| Negative | ≤1.0 | 387 | 16 (4%, 3–7%) | 483 | 53 (11%, 9–15%) | < 0.001 |
| Positive | >1.0 | 194 | 194 (100%, 98–100%) | 98 | 59 (60%, 50–69%) | < 0.001 |
a
Cutoff for dichotomous PSA results to define semen exposure, as previously described[2].
b
Determined using the quantitative IMx PSA assay.
c
Specimen totals in qualitative categories based on PSA concentration in vaginal swab eluates diluted 1:10 for RSID testing.
d
Probability of z-ratio for proportion of specimens positive with ABAcard vs. RSID.
PSA, prostate-specific antigen; Sg, semenogelin; CI, confidence interval.