Table 2.
Comparison of test results for cervical swabsa
| Abbott assay result | No. of swabs with indicated Roche assay result |
|||
|---|---|---|---|---|
| C. trachomatis positive | C. trachomatis negative | N. gonorrhoeae positiveb | N. gonorrhoeae negative | |
| C. trachomatis positive | 511 | 6 | ||
| C. trachomatis negative | 6 | 401 | ||
| N. gonorrhoeae positive | 56 | 2 | ||
| N. gonorrhoeae negative | 2 | 868 | ||
a
For C. trachomatis there was 98.8% ((95% score confidence interval, 97.5% to 99.5%) positive agreement and 98.5% (96.8% to 99.3%) negative agreement. For N. gonorrhoeae there was 96.6% (88.3% to 99.1%) positive agreement and 99.8% (99.2% to 99.9%) negative agreement.
b
Roche N. gonorrhoeae test results were scored as positive only if confirmed by LC assays. Accordingly, 185 initially Roche N. gonorrhoeae-positive samples were considered false-positive results based on LC and are tabulated as Roche N. gonorrhoeae-negative test results.