Table 2.

DNA damage in the brain of newborn rats after whole body exposure to 50 Hz and 0.5 mT MF for 30 days 24 h/day, assessed by comet assay. Each value was expressed as mean of 10 rats ± standard error.

Groups	Grade of damage
	Type (0)	Type (1)	Type (2)	Type (3)	Type (4)	Types (2 + 3 + 4)
Control	49.3 ± 0.67	28.7 ± 2.196	15.3 ± 0.33	6.7 ± 0.33	0	22 ± 0.57
Exposed	17.3 ± 0.67**	43.3 ± 2.31*	19.7 ± 0.33**	13.7 ± 0.88**	6 ± 0.58***	39.3 ± 1.76**

^{∗,∗∗,∗∗∗}Significant difference in comparison with the corresponding control at α = 0.01, 0.001, and 0.0001, respectively.