Chromosomal aberrations: 20% in exposed and 1-2% in controls. 12% type A DNA damage and 1% type E DNA damage in exposed group while 81% type A and 0% type E in controls.
12.6% metaphases with telomeric associations in the exposed smoker group; 6.0% TA in exposed nonsmokers; 9.0% in unexposed smokers and 0.1% TA in control group.
Comet assay: 29.08 μm DNA migration for exposed group, 25.91 μm for controls. Chromosomal aberrations: 50% in exposed, 26.0% in the followup, and 4% in controls.