Sensitivity and specificity analysis
| Self-sample | HC sample | Sensitivity | Specificity | PPV | NPV | |
| N | N | % | % | % | % | |
| Chlamydia trachomatis | ||||||
| Vaginal | + | – | ||||
| + | 5 | 0 | 83.3 | 100 | 100 | 93.3 |
| – | 1 | 14 | ||||
| Pharyngeal | + | – | ||||
| + | 0 | 3 | 0.0 | 93.9 | 0.0 | 97.9 |
| – | 1 | 46 | ||||
| Rectal | + | – | ||||
| + | 11 | 2 | 78.6 | 96.6 | 84.6 | 91.7 |
| – | 3 | 57 | ||||
| Urine/urethral | + | – | ||||
| + | 9 | 0 | 90.0 | 100 | 100 | 97.1 |
| – | 1 | 33 | ||||
| Total | + | – | ||||
| + | 25 | 5 | 80.6 | 96.8 | 83.3 | 96.2 |
| – | 6 | 150 | ||||
| Neisseria gonorrhoeae | ||||||
| Vaginal | + | – | ||||
| + | 1 | 0 | 50.0 | 100 | 100 | 94.7 |
| – | 1 | 18 | ||||
| Pharyngeal | + | – | ||||
| + | 7 | 2 | 77.8 | 95.1 | 77.8 | 95.1 |
| – | 2 | 39 | ||||
| Rectal | + | – | ||||
| + | 19 | 3 | 100 | 94.4 | 86.4 | 100 |
| – | 0 | 51 | ||||
| Urine/urethral | + | – | ||||
| + | 14 | 2 | 100 | 93.1 | 87.5 | 100 |
| – | 0 | 27 | ||||
| Total | + | – | ||||
| + | 41 | 7 | 93.2 | 95.1 | 85.4 | 97.8 |
| – | 3 | 135 | ||||
HC sample, healthcare professional-collected sample; NPV, negative predictive value; PPV, positive predictive value.