Table 1 Baseline characteristics of oral leukoplakia
From: Malignant transformation of oral leukoplakia: a retrospective cohort study of 218 Chinese patients
| Â | Patients |
|---|---|
Characteristic | n (%) |
Total | 218 |
Age, y | Â |
   Mean (SD) | 52.7 (11.2) |
   Range | 21-84 |
   < 40 | 24 (11.0) |
   40 - 49 | 59 (27.1) |
   50 - 59 | 72 (33.0) |
   >= 60 | 63 (28.9) |
Gender | Â |
   Female | 108 (49.5) |
   Male | 110 (50.5) |
Site | Â |
   Tongue | 112 (51.4) |
   Buccal mucosa | 71 (32.6) |
   Gingiva | 14 (6.5) |
   Palate | 13 (6.0) |
   Floor of mouth | 7 (3.2) |
   Lip | 1 (0.5) |
Diet habit | Â |
   Bland | 177 (81.2) |
   Spicy | 28 (12.8) |
   Missing | 13 (6.0) |
Smoking | Â |
   Never | 145 (66.5) |
   Past and present | 65 (29.8) |
   Missing | 8 (3.7) |
Ethanol intake | Â |
   Never | 193 (88.5) |
   Past and present | 15 (6.9) |
   Missing | 10 (4.6) |
Epithelial dysplasia | Â |
   Low-risk | 180 (82.6) |
   High-risk | 38 (17.4) |