Table 1.

Demographic Distribution of Participants

Demographic Details	Control (n = 38)	Cases (n = 37)	Chi-Square/t-Value	P
Age (years, mean ± SD)	42.87 ± 11.86	56.16 ± 9.01	5.45	<.001
Gender
Male	19	29	6.55	.010
Female	19	8
Socioeconomic status
Lower class	3	3	12.82	.012
Lower middle class	6	3
Upper class	13	2
Upper lower class	8	14
Upper middle class	8	15
Behavioral habit
Ex-smoker	18	18	5.46	.36
Former smoker	12	12
Indoor exposure	3	4
No habit	0	1
NS	4	0
Tobacco chewer	1	2

P < .05 = significant, P < .001 = highly significant.

NS, non-significant.