Table 2.

Patient characteristics (metformin users versus nonmetformin users)

	Nondiabetes mellitus (n = 49)		Diabetes mellitus met- (n = 43)		Diabetes mellitusmet+ (n = 49)
	No. of patients	(%)	No. of patients	(%)	No. of patients	(%)	p value
Age	63.28 y		65.04 y		66.45 y
Alcohol	26	53.06	27	62.79	28	57.14	0.46
Betel Nut	25	51.02	24	55.81	27	55.10	0.45
Cigarette	28	57.14	31	72.09	33	67.35	0.54
T1	7	14.29	2	4.65	6	12.24	0.57
T2	13	26.53	12	27.91	16	32.65	0.11
T3	11	22.45	14	32.56	10	20.41	0.15
T4	18	36.73	14	32.56	17	34.69	0.54
N0	8	16.33	9	20.93	13	26.53	0.51
N1	9	18.37	5	11.63	6	12.24	0.07
N2	30	61.22	27	62.79	30	61.22	0.17
N3	2	4.08	2	4.65	2	4.08	0.33
M0	47	95.92	35	81.40	49	100.00	0.33
M1	2	4.08	8	18.60	0	0.00	0.06
Early stage	13	26.53	11	25.58	16	32.65	0.17
Late stage	36	73.47	32	74.42	33	67.35	0.51

Met+, with metformin; met-, without metformin