The influence of neuropsychiatric and functional changes on quality of life in Alzheimer's disease

To investigate the influence of neuropsychiatric manifestations and functional performance on quality of life (QOL) of AD patients and their caregivers/family members. Methods The QOL-AD scale, Mini-Mental State Examination (MMSE), Geriatric Depression Scale (GDS), Cornell and Beck Scales for Depression, Physical and Instrumental-Self Maintenance scales (AIDL and ADL) and the Neuropsychiatric Inventory (NPI) were applied to 60 patients with probable AD, mild (n=30) or moderate (n=30) dementia, according to NINCDS-ADRDA and DSM-III-R criteria, respectively, and to their caregivers/family members. The total scores on the three QOL-AD versions were correlated with the measures previously mentioned. Results The QOL-AD patients' version displayed significant correlations with GDS (-0.76 p<0.01), Cornell (-0.53 p<0.01) and NPI (-0.46 p<0.05) in the mild dementia subgroup. The caregivers' version about patients' QOL correlated with GDS (-0.48 p<0.01), Cornell (-0.57 p<0.01), NPI (-0.46 p<0.01) and AIDL (-0.36 p<0.05), while the caregivers' version about their own QOL was significantly correlated with NPI (-0.43 p<0.01), AIDL (-0.35 p<0.05) and Beck Depression (-0.67 p<0.01). In the moderate dementia subgroup, significant correlations were observed with GDS (-0.45 p<0.05) and Cornell (-0.46 p<0.01). For the caregivers' version about patients' QOL, significant correlations emerged with Cornell (-0.68 p<0.01), NPI (-0.67 p<0.01), AIDL (-0.41 p<0.05), ADL (-0.49, p<0.01) and Beck Depression (-0.33 p<0.05). For the caregivers' version about their own QOL, significant correlations with Beck Depression (-0.54 p<0.01) and ADL (-0.38, p<0.05) were found. Conclusion The symptoms presented in AD affected the QOL in patients and caregivers/family members in both mild and moderate dementia.