Clinical characteristics of 335 patients
| Covariate | Entire Cohort | Oral Tongue | Other Subsitea | P Valueb |
|---|---|---|---|---|
| Total case No. | 335 | 189 (56%) | 146 (44%) | |
| Age (median) (range) (yr) | 62 (22–96) | 60 (22–96) | 64 (28–96.4) | .004c |
| Sex | .260 | |||
| Female | 129 (39%) | 78 (41%) | 51 (35%) | |
| Male | 206 (61%) | 111 (59%) | 95 (65%) | |
| Smoking PY (median) (range) | 10 (0–100) | 5 (0–100) | 20 (0–86) | <.001c |
| pT Category (7th edition) | <.001c | |||
| T1 | 119 (36%) | 47 (25%) | 72 (49%) | |
| T2 | 161 (48%) | 101 (53%) | 60 (41%) | |
| T3 | 55 (16%) | 41 (22%) | 14 (10%) | |
| pN Category (7th edition) | <.001c | |||
| N0 | 181 (54%) | 83 (44%) | 98 (67%) | |
| pN+ | 154 (46%) | 106 (56%) | 48 (33%) | |
| pTT (median) (range) (cm) | 0.9 (0.1–4.0) | 1.1 (0.1–4.0) | 0.6 (0.1–3.9) | <.001c |
| rTT (median) (range) (cm) | 1.0 (0.1–3.4) | 1.2 (0.1–3.0) | 0.6 (0.1–3.4) | <.001c |
| rTT on CT (median) (range) (cm) | 1.0 (0.1–3.4) | 1.3 (0.1–2.7) | 0.7 (0.1–3.4) | <.001c |
| rTT on MR (median) (range) (cm) | 1.2 (0.1–3.0) | 1.3 (0.1–3.0) | 0.3 (0.1–2.8) | <.001c |
| rDOI on CT (median) (range) (cm) | 0.9 (0.0–3.1) | 1.3 (0.1–2.7) | 0.6 (0.0–3.1) | <.001c |
| rDOI on MR (median) (range) (cm) | 1.1 (0.1–3.0) | 1.3 (0.1–3.0) | 0.3 (0.1–2.8) | <.001c |
Note:—PY indicates pack-year; pN+, pathologic-positive lymph nodes.
↵a Other oral cavity subsite included the following: n = 75, floor of mouth; n = 37, buccal mucosa; n = 16, lower alveolar and gingiva; n = 8, retromolar trigone; n = 6, upper alveolar and gingiva; n = 4, hard palate.
↵b P value was for comparison between oral tongue and other oral cavity subsites.
↵c Significant.