TCT detection of STDR for pass/fail criterion of z = −1.75
| True positive | True negative | Total | |
|---|---|---|---|
| Sensitivity = 94% (CI: 73% to 100%), specificity = 95% (CI: 92% to 96%), PPV = 38% (CI: 25% to 53%), NPV = 100% (CI: 99% to 100%). χ2 test = p<0.0001. | |||
| Test positive | 16 | 26 | 42 |
| Test negative | 1 | 467 | 468 |
| Total | 17 | 493 | 510 |