Table 3.

The mean effect (‰) of micronuclei and other nuclear abnormalities in exfoliated buccal epithelial cells of subjects from control groups, exposed workers, smokers and non-smokers.

Group	n	Micronuclei mean (a) ± SE	Nuclear abnormality
			Binucleates mean (a) ± SE	Broken eggs mean (a) ± SE	Karyorrhexis mean (a) ± SE	Karyolysis mean (a) ± SE
Control	50	8.04 ± 0.78	4.08 ± 0.61	4.37 ± 1.06	1.07 ± 0.17	1.27 ± 0.30
Workers	50	20.36 ± 0.78	9.13 ± 0.61	9.62 ± 1.06	2.66 ± 0.17	3.50 ± 0.30
Smokers	50	18.47 ± 0.78	8.01 ± 0.61	10.19 ± 1.06	2.07 ± 0.17	2.57 ± 0.30
Non-smokers	50	9.93 ± 0.78	5.20 ± 0.61	3.81 ± 1.06	1.66 ± 0.17	2.20 ± 0.30

(a): Covariates appearing in the model are evaluated at the following values: Age = 30,9400.