Table 1.
Baseline characteristics of study participants
| Variable | Characteristics |
|---|---|
| Age (years) | |
| < 65 | 201 (72.0%) |
| ≥ 65 | 78 (28.0%) |
| Sex | |
| Men | 249 (89.2%) |
| Women | 30 (10.8%) |
| Site of the primary tumor | |
| Tongue | 113 (40.5%) |
| Buccal mucosa | 85 (30.5%) |
| Gingiva | 34 (12.2%) |
| Retromolar trigone | 18 (6.5%) |
| Mouth floor | 13 (4.7%) |
| Lip | 11 (3.9%) |
| Hard palate | 5 (1.7%) |
| AJCC stage | |
| I | 52 (18.6%) |
| II | 38 (13.6%) |
| III | 45 (16.1%) |
| IV | 144 (51.7%) |
| Tumor size (T classification) | |
| T1 | 70 (25.1%) |
| T2 | 52 (18.6%) |
| T3 | 44 (15.8%) |
| T4 | 113 (40.5%) |
| Nodal metastasis (N classification) | |
| N0 | 179 (64.2%) |
| N1 | 30 (10.8%) |
| N2 | 55 (19.7%) |
| N3 | 15 (5.3%) |
| PNI | 70 (25.1%) |
| ENE | 55 (19.7%) |
| Cancer cell differentiation | |
| W-D/M-D | 248 (88.9%) |
| P-D | 31 (11.1%) |
| Surgical margin | |
| ≥ 5 mm | 206 (73.8%) |
| < 5 mm | 73 (26.2%) |
| DOI ≥ 10 mm | 133 (47.7%) |
| CCI | |
| 0 | 145 (52.0%) |
| 1 | 82 (29.4%) |
| ≥ 2 | 52 (18.6%) |
| Personal Habits | |
| Cigarette Smoking | 231 (82.8%) |
| Betel nut chewing | 222 (79.6%) |
| Alcohol consumption | 187 (67.0%) |
| Treatment | |
| Surgery only | 134 (48.0%) |
| Surgery + RT | 39 (14.0%) |
| Surgery + CRT | 106 (38.0%) |
| Laboratory results | |
| WBC (X103/μL), median (IQR) | 7.70 (6.30-9.70) |
| Neutrophil (X103/μL), median (IQR) | 4.80 (3.59-6.44) |
| Lymphocyte (X103/μL), median (IQR) | 2.01 (1.58-2.59) |
| CRP (mg/dL), median (IQR) | 0.36 (0.13-1.52) |
| Albumin (g/dL), median (IQR) | 4.43 (4.10-4.68) |
| CALLY index, median (IQR) | 2.51 (0.52-7.45) |