Table 5. CAG repeat length of the larger Huntingtin allele in different groups in the COHORT study.

	Groups that carry an expanded allele			Groups that do not carry an expanded allele
	Individuals with clinically diagnosed HD[n = 930]	First-degree relatives who pursued genetic testing and carry an expanded allele[n = 248]	First-degree relatives who did not pursue genetic testing and carry an expanded allele[n = 112]	First-degreerelatives who did not pursue genetic testing and do not carry an expanded allele[n = 224]	First-degree relatives who pursued genetic testing and do not carry an expanded allele[n = 41]	Spousesand caregivers[n = 430]
(CAG)n of 26 or less [n (%)]	0	0	0	209 (93.3)	38 (92.7)	398 (92.6)
(CAG)n between 27 and 35 (inclusive) [n (%)]	0	0	0	15 (6.7)	3 (7.3)	32 (7.4)
(CAG)n between 36 and 39 (inclusive) [n (%)]	15 (1.6)	25 (10.1)	13 (11.6)	0	0	0
(CAG)n of 40 or more [n (%)]	915 (98.4)	223 (89.9)	99 (88.4)	0	0	0