Table 1.

Demographic information of participants.

	715 prodromal HD	Female (N = 447, 62.5%)	Male (N = 268, 37.5%)
Age	42.55 ± 10.53 (19–83)	42.6 ± 10.5	43.5 ± 10.7
Cytosine adenine guanine repeats	42.47 ± 2.54 (37–61)	42.43 ± 2.57	42.53 ± 2.50
Education years	14.50 ± 2.61 (8–20)	14.36 ± 2.55	14.73 ± 2.69
Race (self-reported)	694 (97.06%) White	96.64% White	97.76% White
	1 American Indian	1 American Indian	1 Asians
	3 Asians	2 Asians	3 intermixed
	14 intermixed	11 intermixed	2 unknown
	7 unknown	5 unknown
Race (genetic estimated)	97.34% Caucasian	97.09% Caucasian	97.76% Caucasian
	1 Asian	1 Asian	2 intermixed
	2 intermixed	12 Mexican/Indians	5 Mexican/Indians
	17 Mexican/Indians