Table 1.

Patient characteristics

Variable	N	Mean	Std Dev	Minimum	Maximum
Age at first exam	70	50.9	14.6	19.8	82.7
Age at diagnosis	59	44.6	14.9	15.0	77.2
Years of education	70	13.0	2.7	5.0	19.0
UHDRS Total Motor Score	70	45.83	15.90	11.0	81.0
Verbal Fluency	70	21.50	11.91	3.00	47.00
SDMT	70	22.91	9.66	5.00	48.00
Stroop Color	70	42.61	15.36	8.00	76.00
Stroop Word	70	54.00	21.30	14.00	110.00
Stroop Interference	70	23.24	9.81	2.00	43.00
Tinetti Mobility Total Score	70	19.64	5.78	3.00	28.00
Number of visits per patient	70	1.7	0.9	1	4
Overall study time for patients with multiple visits (y)	34	1.8	0.9	0.4	3.2

SDMT, Symbol Digit Modalities Test; UHDRS, Unified Huntington’s disease rating scale.