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. Author manuscript; available in PMC: 2015 Oct 1.

Published in final edited form as: Environ Int. 2014 Jun 28;71:81–87. doi: 10.1016/j.envint.2014.06.006

Table 3.

Differences in average mean methylation levels between boys and girls for the ten repetitive elements analyzed


	Repetitive Element	Mean % methylation (SD)		p-value

		Girls (n=97)	Boys (n=95)
LINEs	L1PA5¹	23.28 (2.40)	23.03 (2.71)	0.349
	L1PA2¹	44.37 (2.57)	43.98 (2.77)	0.159
	L1Hs	55.42 (2.92)	55.35 (2.99)	0.639
	L1Ta	50.32 (3.09)	50.37 (3.26)	0.862

*Alus*	AluSx¹	25.89 (1.08)	26.40 (0.98)	<0.001^*
	AluYb8¹	82.91 (1.80)	83.50 (1.91)	0.001^*
	AluYd6	65.14 (3.1)	66.25 (3.00)	0.004^*

HERVs	MLT1D	86.22 (3.39)	86.44 (3.55)	0.524
	ERV1¹	17.22 (2.34)	17.56 (1.97)	0.004^*
	ERV9¹	49.48 (5.74)	49.83 (2.64)	<0.001^*

¹

Mann Whintey U- tests were used since these repetitive elements presented a non-normal distribution.

^*

Significant below p-value ≤ 0.001