Table 3. Comparison between DNA fragmentation, frequency of micronucleus and viability in gasoline station workers and controls.

Items	Gasoline station workers (n=62) Mean ± SD	Controls (n=62) Mean ± SD	Mann- Whitney test	p
DNA fragmentation (OD)	23.39 ± 4.45	3.75 ± 0.87	8.57*	0.000
Micronucleus %	2.18 ± 1.33	0.45 ± 0.06	2.54	0.001
Dead cells %	15.25 ± 13.66	4.50 ± 0.58	1.54	0.020

OD: optical density OD: optical density and *t-test was used