Table 2.

Descriptive statistics of WMH volume (in cm³), including median, first quartile (Q1), third quartile (Q3), and interquartile range for tight bands of participants defined by estimated years to symptom onset and stratified by mutation status.

	Mutation non-carrier					Mutation carrier					Total
EYO	N	Med	Q1	Q3	IQR	N	Med	Q1	Q3	IQR	N	Med	Q1	Q3	IQR
−30 to −20 y	13	0.19	0.04	0.44	0.40	18	0.41	0.19	0.72	0.54	31	0.24	0.04	0.72	0.68
−20 to −10 y	40	0.35	0.05	0.79	0.74	52	0.29	0.05	0.81	0.76	92	0.34	0.05	0.80	0.75
−10 to 0 y	36	0.23	0.05	0.75	0.70	73	0.37	0.09	1.01	0.91	109	0.32	0.05	0.97	0.92
0 to 10 y	15	0.08	0.00	0.36	0.36	35	0.43	0.00	1.93	1.93	50	0.29	0.00	1.10	1.10
10 to 21 y	11	0.27	0.00	0.48	0.48	6	0.55	0.13	2.12	1.99	17	0.27	0.10	0.51	0.41
Total	115	0.24	0.04	0.66	0.62	184	0.37	0.07	0.97	0.90	299	0.31	0.05	0.89	0.84