Sommerlad, A; Singleton, D; Jones, R; Banerjee, S; Livingston, G; (2017) Development of an instrument to assess social functioning in dementia: The Social Functioning in Dementia scale (SF-DEM). Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring , 7 pp. 88-98. 10.1016/j.dadm.2017.02.001.

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Abstract

INTRODUCTION: Social functioning is a core domain in the life of people with dementia, but there is no accepted instrument to measure it. We aimed to develop the Social Functioning in Dementia (SF-DEM) scale and test its psychometric properties for assessing social function in people with dementia. METHODS: We interviewed people with mild dementia and family caregivers to develop patient and caregiver-rated SF-DEM versions and refined them through interviews with health care professionals. We tested its psychometric properties in 30 dyads of people with dementia and family caregivers. RESULTS: Both SF-DEM versions had content validity and demonstrated concurrent validity against a single item rating overall social functioning (patient rated r = 0.42, 95% CI [0.07–0.68]; caregiver rated r = 0.59, 95% CI [0.29–0.78]). All participants found it acceptable. Analyses showed reliability (test–retest, inter-rater, internal consistency) and indications of responsiveness to change. DISCUSSION: SF-DEM shows promise as a valid, reliable, acceptable measure of social functioning in dementia.

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