[Table/Fig-2]:

Regression of occurrence of aphthous ulceration, Dependent variable is occurrence of Aphthous ulcer

Variable	Reference	p-value	Odds ratio	C I Lower	95% Upper
Tobacco user	Non tobacco user	0.02	0.41	0.19	0.87
Male	Female	0.31	0.70	0.35	1.39
Urban	Rural	0.50	1.43	0.51	3.87
18 to 25 years	> 56 years	0.97	1.01	0.34	3.04
26 to 35 years	> 56 years	0.18	2.13	0.69	6.59
36 to 45 years	> 56 years	0.23	0.47	0.13	1.62