Table 3. Comparison of qualitative variables between groups with and without dysplasia.

	Smoker			Ethnicity				Gender
	Yes	No	Former	Asian	White	Mixed-race	Black	Male	Female
Dysplasia	17	33	6	3	58	5	3	46	25
No dysplasia	43	193	34	6	366	25	11	316	259
p-value	p=0.04			p=0.325				p=0.155