Histopathologic results of the second biopsy through direct laryngoscopy
under general anesthesia n (%) |
|
|
|
Squamous cell carcinoma |
24 (80.0) |
20 (66.7) |
<
0.001 |
Inflammatory cells |
1 (3.3) |
7 (23.3) |
|
Dysplasia |
4 (13.3) |
2 (6.7) |
|
Papilloma |
1 (3.3) |
1 (3.3) |
|
Diagnostic test results |
|
|
|
True positive |
23 (76.7) |
5 (16.7) |
< 0.001 |
True negative |
5 (16.7) |
10 (33.3) |
|
False negative |
1 (3.3) |
14 (46.7) |
|
False positive |
1 (3.3) |
1 (3.3) |
|
Sensitivity |
95.8% |
26.3% |
|
Specificity |
83.3% |
90.9% |
|
Positive predictive value (PPV) |
95.8% |
83.3% |
|
Negative predictive value (NPV) |
83.3% |
41.7% |
|
Diagnostic accuracy |
93.3% |
50.0% |
|