Table 1.
Characteristics of patients with advanced nasopharyngeal carcinoma according to EBV status.
| Variables | Total patients N = 146 (%) |
EBV infection | ||
|---|---|---|---|---|
| Positive N = 87 (%) |
Negative N = 59 (%) |
P value | ||
| Age at IV stage, yrs | ||||
| Mean SD (median) | 50.07 ± 11.25 | 50.11 ± 11.02 | 50.00 ± 11.77 | 0.952 |
| Range | 21–78 | 26–75 | 21–78 | |
| < 50 | 73 (50.0) | 44 (50.6) | 29 (49.2) | 0.866 |
| ≥ 50 | 73 (50.0) | 43 (49.4) | 30 (50.8) | |
| Sex | 0.060 | |||
| Male | 113 (77.4) | 72 (82.8) | 41 (69.5) | |
| Female | 33 (22.6) | 15 (17.2) | 18 (30.5) | |
| Smoker | 0.521 | |||
| Yes | 74 (50.7) | 46 (52.9) | 28 (47.5) | |
| No | 72 (49.3) | 41 (47.1) | 31 (52.5) | |
| HBsAg | 0.403 | |||
| Positive | 21(15.3) | 14(17.5) | 7(12.3) | |
| Negative | 116(84.7) | 66(82.5) | 50(87.7) | |
| T-stage | 0.871 | |||
| Tx-3 | 105 (71.9) | 63 (72.4) | 42 (71.2) | |
| T4 | 41 (28.1) | 24 (27.6) | 17 (28.8) | |
| N-stage | 0.370 | |||
| N0-2 | 102 (69.9) | 58 (19.0) | 44 (74.6) | |
| N3 | 44 (30.1) | 29 (81.0) | 15 (25.4) | |
| M-stage | 0.147 | |||
| M0 | 40 (27.4) | 20(23.0) | 20 (33.9) | |
| M1 | 106 (72.6) | 67 (77.0) | 39 (66.1) | |
| Clinical stage | 0.349 | |||
| IVa | 18 (12.3) | 9 (10.3) | 9 (15.3) | |
| IVb | 22 (15.1) | 11 (12.7) | 11 (18.6) | |
| IVc | 106 (72.6) | 67 (77.0) | 39 (66.1 | |
| Lung metastases | 0.789 | |||
| Yes | 32 (21.9) | 19 (21.8) | 13 (22.0) | |
| No | 114 (78.1) | 68 (78.2) | 46 (78.0) | |
| Liver metastases | 0.040 | |||
| Yes | 38 (26.0) | 28 (32.2) | 10 (16.9) | |
| No | 108 (74.0) | 59 (67.8) | 49 (83.1) | |
| Bone metastases | 0.121 | |||
| Yes | 53 (36.3) | 36 (41.4) | 17 (28.8) | |
| No | 93 (63.7) | 51 (58.6) | 42 (71.2) | |
| Prior radiotherapy | 0.278 | |||
| Yes | 59 (40.4) | 32 (36.8) | 27 (45.8) | |
| No | 87 (59.6) | 55 (63.2) | 32 (54.2) | |
| Prior chemotherapy | 0.220 | |||
| Yes | 58 (39.7) | 31 (35.6) | 27 (45.8) | |
| No | 88 (60.3) | 56 (64.4) | 32 (54.2) | |
| HBsAg positive | 0.345 | |||
| Yes | 21 (14.4) | 14 (16.1) | 7 (11.9) | |
| No | 116 (79.4) | 66 (75.9) | 50 (84.7) | |
| Unknown | 9 (6.2) | 7 (8.0) | 2 (3.4) | |