TABLE 1.
Value of leukocyte/epithelial cell ratios detected in liquid cytology specimens for predicting M. genitalium and other STIs
| Infection status | Parameter | Value at indicated threshold of leukocyte/EC ratio |
|
|---|---|---|---|
| >2.0 | >2.5 | ||
| M. genitalium positive (n = 7) | No. | 7 | 5 |
| % | 100.0 | 71.4 | |
| M. genitalium negative (n = 70) | No. | 16 | 10 |
| % | 22.9 | 14.3 | |
| P valuea | 0.0001 | 0.0025 | |
| PPVb (%) | 100.0 | 71.4 | |
| C. trachomatis positive (n = 10) | No. | 7 | 5 |
| % | 70.0 | 50.0 | |
| C. trachomatis negative (n = 67) | No. | 16 | 10 |
| % | 23.9 | 14.9 | |
| P valuea | 0.0062 | 0.0205 | |
| PPVb (%) | 70.0 | 50.0 | |
| N. gonorrhoeae positive (n = 3) | No. | 2 | 2 |
| % | 66.7 | 66.7 | |
| N. gonorrhoeae negative (n = 74) | No. | 21 | 13 |
| % | 28.4 | 17.6 | |
| P valuea | 0.211 | 0.0952 | |
| PPVb (%) | 66.7 | 66.7 | |
| T. vaginalis positive (n = 20) | No. | 4 | 3 |
| % | 20.0 | 15.0 | |
| T. vaginalis negative (n = 57) | No. | 19 | 12 |
| % | 33.3 | 21.1 | |
| P valuea | 0.3952 | 0.7466 | |
| PPVb (%) | 20.0 | 15.0 | |
a
Fisher's exact test.
b
The PPV is equal to the percentage of subjects identified with >2 or >2.5 leukocytes/epithelial cell/HPF who tested positive for the indicated STI.