Table 1. .

Comparison of Skewed X-Inactivation Ratios in Newborn and Adult Populations

				Percentage of Population withX-Inactivation Ratio of
Population	n	Mean	SD	<20:80/>80:20	<10:90/>90:10	<5:95/>95:5
Newborns	590	50:50	15.4	4.9	.5	.2
Adults	415	48:52	19.3	14.2	3.6	1.7
Total	1,005	49:51	17.2	8.8	1.8	.8