Characteristic | N (%) or median (range) |
---|---|
(A) | |
 Patient characteristics | |
  Age | 59 (29–75) |
 Primary site | |
  Tonsil | 41 (82) |
  Base of tongue | 7 (14) |
  Soft palate | 2 (4) |
 Sex | |
  Male | 45 (90) |
  Female | 5 (10) |
 Smoking history | |
  Non-smoker | 17 (34) |
  Smoker ≤10 PPY | 5 (10) |
  Smoker > 10 PPY | 28 (56) |
 Treatment characteristics | |
 Primary surgery | |
  Wide excision | 26 (52) |
  Transoral robotic surgery | 24 (48) |
 Ipsilateral neck dissection | |
  Radical neck dissection | 4 (8) |
  Modified radical neck dissection | 46 (92) |
 Contralateral neck dissection | |
  Modified radical neck dissection | 4 (8) |
  Selective neck dissection | 37 (74) |
  Not-done | 9 (18) |
 Adjuvant treatment | |
  Chemoradiotherapy | 35 (70) |
  Radiotherapy | 15 (30) |
(B) | |
 T stage | |
  T1 | 24 (48) |
  T2 | 24 (48) |
  T3-T4 | 2 (4) |
 Depth of invasion (mm) | 9 (7–37) |
 LN number | |
  1–4 | 36 (72) |
   > 4 | 14 (28) |
 Largest LN size (cm) | |
   ≤ 3 | 26 (52) |
   > 3 but ≤6 | 19 (38) |
   > 6 | 1 (2) |
  N/A | 4 (8) |
 Extranodal extension | |
  Negative | 21 (42) |
  Positive | 29 (58) |
 Tumor grade | |
  Well to moderately | 30 (60) |
  Poorly | 16 (32) |
  N/A | 4 (8) |
 HPV status | |
  Negative | 18 (36) |
  Positive | 27 (54) |
  N/A | 5 (10) |
 Surgical margin | |
  Negative | 35 (70) |
  Positive or close | 15 (30) |
 Lymphatic invasion | |
  Yes | 29 (58) |
  No | 21 (42) |
 Vascular invasion | |
  Yes | 4 (8) |
  No | 46 (92) |
 Perineural invasion | |
  Yes | 5 (10) |
  No | 45 (90) |