| http://www.w3.org/ns/prov#value | - Potential confounders, such as age, sex, study site, and education level (as a proxy for premorbid intelligence), were controlled for in all analyses, with the exception of whole-brain volume measures, for which age, sex, study site, and intracranial volume were controlled for.We estimated adjusted differences among HD subgroups and controls with linear models.
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