Table 4.
Association between EBV status and patients’ clinical characteristics.
| Variable | Categories | EBV Status | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Negative | Positive | OR | 95%CI for OR | ||||||
| N | % | N | % | Lower | Upper | p-Value | |||
| Stage group | I | 1 | 50.0 | 1 | 50.0 | 0.10 | 0.01 | 2.18 | 0.141 |
| II | 0 | 0.0 | 10 | 100.0 | 2.44 | 0.11 | 55.56 | 0.576 | |
| III | 2 | 3.6 | 54 | 96.4 | 2.57 | 0.34 | 19.46 | 0.360 | |
| IV-A | 1 | 1.8 | 54 | 98.2 | 5.14 | 0.44 | 59.77 | 0.191 | |
| IV-B | 2 | 8.7 | 21 | 91.3 | 1.00 | ||||
| Bone metastasis | No | 5 | 3.7 | 129 | 96.3 | 1 | 0.45 | ||
| Yes | 1 | 8.3 | 11 | 91.7 | 0.43 | 0.05 | 3.97 | ||
| Liver metastasis | No | 5 | 3.6 | 133 | 96.4 | 1 | 0.25 | ||
| Yes | 1 | 12.5 | 7 | 87.5 | 0.263 | 0.03 | 2.57 | ||
| Lung metastasis | No | 4 | 2.9 | 135 | 97.1 | 1 | 0.008 * | ||
| Yes | 2 | 28.6 | 5 | 71.4 | 0.07 | 0.01 | 0.51 | ||
| Other sites of Metastasis | No | 6 | 4.4 | 131 | 95.6 | 1 | 0.97 | ||
| Yes | 0 | 0.0 | 9 | 100.0 | 0.94 | 0.05 | 17.95 | ||
| Morphology | Keratinized, squamous cell carcinoma | 1 | 100.0 | 0 | 0.0 | 0.01 | 0.00 | 0.32 | 0.009 * |
| Differentiated, non-keratinizing squamous cell carcinoma | 1 | 9.1 | 10 | 90.9 | 0.308 | 0.031 | 3.02 | 0.312 | |
| Undifferentiated, non-keratinizing squamous cell carcinoma | 4 | 3.0 | 130 | 97.0 | 1.00 | - | - | - | |
| Treatment Response | Good response | 3 | 2.4 | 120 | 97.6 | 5.00 | 0.47 | 53.70 | 0.184 |
| Poor response | 2 | 14.3 | 12 | 85.7 | 0.75 | 0.06 | 9.72 | 0.826 | |
| No treatment | 1 | 11.1 | 8 | 88.9 | 1.00 | - | - | - | |
N = Number, OR = odd ratio, CI = confidence interval. * Indicate significant p-values (p < 0.05).