Caregiver burden - Zarit Burden Inventory (ZBI) = 22, 46 ± 16, 07 - The burden has positive correlation with: duration of disease (r = 0, 251, p = 0, 006), Neuropsychological symptoms of patients (r = 0, 313, p = 0, 001), caregivers age (r = 0, 487, p = 0, 000), caregiving years (r = 0, 38, p = 0, 000), caregiving hours per day (hours) (r = 0, 627, p = 0, 000).