Table 1.

Demographics of the groups and characteristics of patient cases (145 cases from 95 patients).

		Count	Age (range) ± SD	Male	Female
Nonprogressing		46	56 (27–84) ±13
	Low grade dysplasia* £	12	60 (43–84) ±14	7	4
	High grade dysplasia** £	18	60 (40–84) ±13	13	4
	Nondysplastic	16	50 (27–69) ±10	12	4
Progressing		49	65 (29–93) ±13
	Low grade dysplasia	13	65 (48–93) ±13	6	7
	High grade dysplasia	19	63 (29–87) ±14	13	6
	Nondysplastic ***	17	68 (46–79) ±11	10	7
OSCC	OSCC*	50	66 (29–93) ±13	27	23

If one patient had multiple biopsies, age was considered at the time of taking each biopsy. Asterisks represent the number of patients missing age (* = 1, ** = 2, *** = 3). (£) represent the number of patients missing gender. Nondysplastic lesions include: hyperkeratosis = 18, nonspecific chronic inflammation = 8, nonspecific ulcer = 3, lichenoid inflammation = 2 and chronic inflammation and candidiasis = 2.