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a, b Items of IADL independence with aging in Lawton IADL. Percentage of independent persons (grade 1 on the Lawton IADL Scale items) in each age group. While both groups generally showed decreases in IADL independence with aging, the decreasing slope was steeper in patients with vmAD compared to HC. a Very mild AD patients (n = 104). b Healthy controls (n = 104).
