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BACKGROUND: Psychiatric symptoms and behavioral disturbances are highly prevalent in the residents of nursing homes. The Neuropsychiatric Inventory (NPI) is a commonly used scale for the assessment of such symptoms in diverse settings. We have conducted a study of the reliability and the validity of the Norwegian version of the NPI nursing home version (NPI-NH). METHODS: The reliability study comprised 41 patients. We established inter-rater reliability between raters with various levels of health education using kappa statistics. Fifty patients were included in the validity study. The patients were examined by a physician, who also rated the patient's behavior using "behavioral pathology in Alzheimer's disease" (BEHAVE-AD). Subsequently, a research nurse performed a standardized interview using the NPI and the Cornell scale. Concurrent validity of the NPI and the BEHAVE-AD was analyzed. RESULTS: Internal consistency, as measured by Cronbach's alpha was above 0.8. Inter-rater reliability was, except for one item, between 0.85 and 1.0 across assessors with different levels of health education. All correlations between the NPI and the BEHAVE-AD were significant, ranging from 0.38 to 0.72. The weakest correlations were between items assessing affective and anxiety symptoms. CONCLUSION: The Norwegian version of the NPI-NH is a reliable and valid instrument for assessing psychiatric symptoms and behavioral disturbances in the residents of nursing homes. The investigation of depressive symptoms merits particular attention.
Selbæk et al. (Sun,) studied this question.