Characteristics Associated with Quality of Life in Long-Term Care Residents with Dementia: A Cross-Sectional Study

BACKGROUND: To determine which characteristics are associated with quality of life (QOL) in residents with moderate to very severe dementia in long-term care facilities (LTCFs). MATERIAL AND METHODS: This was a cross-sectional analysis of a cluster randomized controlled study in 12 Dutch LTCFs that enrolled 288 residents, with moderate to severe dementia assessed with the Reisberg Global Deterioration Scale (Reisberg GDS) and QOL with the QUALIDEM. Characteristics that were hypothesized to be associated with the six domains of QOL (applicable to very severe dementia) included demographic variables, activities of daily living (Katz ADL), cognitive performance (Cognitive Performance Scale; CPS), pain (Pain Assessment Checklist for Seniors with Limited Ability to Communicate; PACSLAC-D), neuropsychiatric symptoms (Neuropsychiatric Inventory-Nursing Home Version; NPI-NH) and comorbidities. RESULTS: Multivariate logistic regression modelling showed associations with age in the domain Social isolation odds ratio, OR, 0.95 (95% confidence interval, CI, 0.91-0.99), ADL level in the domain Positive affect OR 0.89 (95% CI 0.83-0.95) and the domain Social relations OR 0.87 (95% CI 0.81-0.93), severity of dementia in the domain Social relations OR 0.28 (95% CI 0.12-0.62) and in the domain Social isolation OR 2.10 (95% CI 1.17-3.78), psychiatric disorders in the domain Positive affect OR 0.39 (95% CI 0.17-0.87) and pulmonary diseases in the domain Negative affect OR 0.14 (95% CI 0.03-0.61) of the QUALIDEM. Neuropsychiatric symptoms were independently associated with all six domains of the QUALIDEM OR 0.93 (95% CI 0.90-0.96) to OR 0.97 (95% CI 0.95-0.99). Pain was associated with the domains Care relationship OR 0.92 (95% CI 0.84-1.00) and Negative affect OR 0.92 (95% CI 0.85-1.00). CONCLUSION: QOL in dementia is independently associated with age, ADL, dementia severity, pain, psychiatric disorders, pulmonary diseases and neuropsychiatric symptoms. It is possible to detect persons with dementia at risk for a lower QOL. This information is important for developing personalized interventions to improve QOL in persons with dementia in LTCFs.