Table 1. Clinical characteristics of cohort (number and percent) with prognostic ability by univariate logistic regression (P-value).

Histological grade		0.0002
Mild	69 (47)
Moderate	50 (34)
Severe	27 (18)
CIS	2 (1)
Gender		0.14
Male	76 (51)
Female	72 (49)
Site of lesion		0.73
Tongue	69 (47)
Floor of mouth	20 (13)
Palate	18 (12)
Buccal	38 (26)
Retromolar	3 (2)
Morphology of lesion		0.03
White patch	94 (63)
Red patch	15 (10)
Speckled patch	13 (9)
Ulcer	22 (15)
Lump	4 (3)
Alcohol consumption		0.61
>21 U/week	23 (15)
<21 U/week	58 (40)
None	44 (30)
Unknown	23 (15)
Smoking status		0.29
Current	69 (47)
Ex	9 (6)
Non	47 (32)
Unknown	23 (15)

Abbreviation: CIS=carcinoma in situ.