Table 2. : Percentage levels of ICR1 and ICR2 methylation in controls and cases.

Population (number of subjects)	Mean methylation, % (range)
	ICR1	ICR2
Postnatal analyses
Controls (103)	46 (40–52)	45 (39–50)
Cases (41)
7	71 (57–86)*	47 (41–50)
4	49 (46–53)	18 (6–26)*
8	59 (55–68)*	34 (31–36)*
22	48 (44–52)	45 (42–49)
Prenatal analyses
Amniotic fluid controls (16)	44 (38–48)	42 (37–47)
Cases (3)
1	48	30*
2	46 (44–47)	41 (37–45)

^*Abnormal methylation.