The Reliability and Validity of the Norwegian Version of the Quality of Life in Late-Stage Dementia Scale.
AIM
To translate the Quality of Life in Late-Stage Dementia (QUALID) Scale into Norwegian, and to evaluate the test-retest reliability and validity of the scale.


METHOD
QUALID was translated according to standardised procedures. Residents with dementia living in nursing homes were included in the study and assessed using QUALID, Cornell Scale for Depression in Dementia, Neuropsychiatric Inventory, Physical Self-Maintenance Scale and Clinical Dementia Rating Scale.


RESULTS
Cronbach's α of QUALID was 0.79. In the reliability study, the intra-class correlation was 0.83. The validity study showed a strong association between depressive symptoms and QUALID, and a moderate association between QUALID and assessments of level of functioning and agitation.


CONCLUSIONS
The Norwegian version of QUALID is a reliable and valid scale for assessing quality of life in nursing home residents with dementia.