Results of NPM for culture positives
| Urethral | Endocervical | |
| NPM positive | 29 (12 Cx NPM negative) | 29 (12 Ur NPM negative) |
| NPM negative | 99 | 138 |
| NPM not done | 49 | 69 |
| Sensitivity NPM | 29/128 (23%) | 29/167 (17%) |
| False positives* | 3 | 13 |
* NPM was positive for GC but samples were culture negative