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Non-dominant hand 9 hole peg test time over baseline and 1-year visit per quintile of WMH volume (%ICV) change. Q1 reflects the greatest WMH volume reduction, Q5 the greatest WMH volume increase. 9HPT: 9 Hole Peg Test; BL: Baseline; ICV: Intracranial volume; Q: Quintile; WMH: White matter hyperintensity.
