Table I. Demographic and Clinical Characteristics of Patients Analyzed with IHC.
| Sex | Male | 52 | 72.2% |
| Female | 20 | 27.8% | |
| Race | White | 43 | 59.7% |
| Asian | 3 | 4.2% | |
| African-American | 26 | 36.1% | |
| Age | <55 | 26 | 36.1% |
| 55-64 | 28 | 38.9% | |
| >64 | 18 | 25.0% | |
| Primary Tumor Site | Oral Cavity | 35 | 48.6% |
| Oropharynx | 4 | 5.6% | |
| Larynx | 33 | 45.8% | |
| Clinical TNM Stage | I | 8 | 11.1% |
| II | 18 | 19.7% | |
| III | 17 | 25.0% | |
| IV | 25 | 23.6% | |
| Unknown | 4 | 34.7% | |
| Clinical T Stage | T1 | 8 | 11.1% |
| T2 | 18 | 25.0% | |
| T3 | 17 | 23.6% | |
| T4 | 25 | 34.7% | |
| Tx | 4 | 5.6% | |
| Clinical N Stage | N0 | 32 | 44.4% |
| N1 | 10 | 13.9% | |
| N2 | 25 | 34.7% | |
| N3 | 1 | 1.4% | |
| Unknown | 4 | 5.6% | |
| Differentiation | Well-differentiated | 3 | 4.2% |
| Moderate | 45 | 62.5% | |
| Poor | 13 | 18.1% | |
| Unknown | 11 | 15.3% |