Psychometric Validation of the Czech Version of the Quality of Life - Alzheimer's Disease Scale in Patients with Early-Stage Dementia.

BACKGROUND/AIMS: The aim of this study was to perform a psychometric validation of the Czech version of the Quality of Life - Alzheimer's Disease scale (QoL-AD) for patients with early-stage dementia.

METHODS: The sample included 212 patient-proxy pairs. For convergent validity, the Czech version of the Bristol Activities of Daily Living Scale (BADLS-CZ), the Short Physical Performance Battery (SPPB), and the Geriatric Depression Scale (GDS) were used.

RESULTS: The reliability of the QoL-AD for patients and caregivers was good (Cronbach's α = 0.85, ICC = 0.25-0.54). A positive correlation existed between the QoL-AD and the SPPB, and negative correlations existed between the QoL-AD and the BADLS-CZ as well as between the QoL-AD and the GDS. Factor analysis resulted in a three-factor solution (physical and mental health, family life, and social security).

CONCLUSION: The Czech version of the QoL-AD has good psychometric properties in compliance with international recommendations.