TABLE 1.
Test characteristics
| Specimen typec and/or criterion | Value for test method
|
||
|---|---|---|---|
| N. gonorrhoeae culture | CA N. gonorrhoeae PCRa | Final N. gonorrhoeae PCR resultb | |
| True positive | |||
| No. of positive results | 58 | 85 | 84 |
| No. of negative results | 27 | 0 | 1 |
| True negative | |||
| No. of positive results | 0 | 70 | 3 |
| No. of negative results | 2,938 | 2,868 | 2,935 |
| Sensitivity (%) | 68.2 | 100 | 98.8 |
| Specificity (%) | 100 | 97.6 | 99.9 |
| Positive predictive value (%) | 100 | 54.8 | 96.6 |
| Negative predictive value (%) | 99.1 | 100 | 100 |
a
Only specimens which were repeatedly reactive in the CA N. gonorrhoeae PCR test were considered to be CA N. gonorrhoeae PCR positive.
b
Specimens which were repeatedly positive by CA N. gonorrhoeae PCR and positive by 16SrRNA N. gonorrhoeae PCR were considered to be N. gonorrhoeae PCR positive. All other specimens were N. gonorrhoeae PCR negative.
c
Specimens were considered to be true N. gonorrhoeae positive or true N. gonorrhoeae negative as described in the text.