Association of Polymorphisms of Phase I Metabolizing Genes with Sister Chromatid Exchanges in Occupational Workers Exposed to Toluene Used in Paint Thinners

Table 1

Demographic characteristics of exposed and control population.

Variables	Control	Exposed	value
All ()	30	30
Age	31.23 ± 6.60	29.77 ± 6.52	0.390
Working exposure per day (hrs)		6.20 ± 2.93
Duration of exposure (yrs) () %
<6		(13) 43.33	<0.05
>6		(17) 56.67
Smoking
Nonsmokers	25 (83.3)	24 (80)	0.739
Smokers	5 (16.7)	6 (20)
Alcohol intake
Alcohol users	24 (80)	25 (83.3)	0.739
Nonalcohol users	6 (20)	5 (16.7)
Tobacco intake
Nontobacco users	26 (86.7)	28 (93.3)	0.389
Tobacco users	4 (13.3)	2 (6.7)

Student’s -test was applied for comparing mean value among control and exposed group. Chi-square test was applied for difference in consumption habits history among studied population. Level of significance was set at .