Table 1.
Baseline characteristics of all 318 pairs of stage III-IVB NPC patients (except T3-4N0) with or without IC.
| IC | Non-IC | ||
|---|---|---|---|
| Characteristics | No. (%) | No. (%) | P |
| Age (median, y) | 46 | 44 | 0.293a |
| Gender | 0.851b | ||
| Male | 245 (77.0) | 243 (76.4) | |
| Female | 73 (23.0) | 75 (23.6) | |
| Concurrent chemotherapy | 0.232b | ||
| Yes | 283 (89.0) | 273 (85.8) | |
| No | 35 (11.0) | 45 (14.2) | |
| Smoking | 0.807b | ||
| Yes | 123 (38.7) | 126 (39.6) | |
| No | 195 (61.3) | 192 (60.4) | |
| Drinking | 0.802b | ||
| Yes | 37 (11.6) | 35 (11.0) | |
| No | 281 (88.4) | 283 (89.0) | |
| T category c | 0.267b | ||
| T1 | 13 (4.1) | 14 (4.4) | |
| T2 | 23 (7.2) | 12 (3.8) | |
| T3 | 214 (67.3) | 227 (71.4) | |
| T4 | 68 (21.4) | 65 (20.4) | |
| N category c | 0.984b | ||
| N1 | 209 (65.7) | 211 (66.4) | |
| N2 | 76 (23.9) | 75 (23.6) | |
| N3 | 33 (10.4) | 32 (10.0) | |
| Overall stage c | 0.931b | ||
| III | 224 (70.4) | 225 (70.8) | |
| IVA-IVB | 94 (29.6) | 93 (29.2) | |
| Pre-DNA (median, copies/ml) | 5500 | 4260 | 0.551a |
Abbreviations: NPC = nasopharyngeal carcinoma; IC = induction chemotherapy; Pre-DNA = pre-treatment Epstein-Barr virus DNA.
a P-values were calculated by Non-parametric test.
b P-values were calculated by Chi-square test or Fisher exact test if indicated.
c According to the 7th AJCC/UICC staging system.