Table 1

Demographic data (mean(SD)) for the 585 study participants with unequivocal DNA results and without manifest Huntington's disease

Demographic	PSGCs (n=171)	NGCs (n=414)	p Value
Age	36.4 (8.2)	40.6 (10.8)	0.0001
Education	15.0 (2.6)	14.8 (3.0)	0.31
Male-female ratio^1-150	55/116)	126/288	0.70
Size of smaller allele	19.4 (3.5)	18.9 (2.2)^1-151	0.05
Size of larger allele	42.6 (2.2)	20.6 (3.1)	0.0001

PSGCs=presymptomatic gene carriers; NGCs=non-gene carriers.
↵1-150 Ratio evaluated using χ² statistic. All other comparisons performed by t test.
↵1-151 Average allele size used for the NGC.