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The social functioning in dementia scale (SF-DEM): Exploratory factor analysis and psychometric properties in mild, moderate and severe dementia

Budgett, Jessica, Brown, Anna, Daley, Stephanie, Page, Thomas, E., Banerjee, Sube, Livingston, Gill, Sommerlad, Andrew (2019) The social functioning in dementia scale (SF-DEM): Exploratory factor analysis and psychometric properties in mild, moderate and severe dementia. Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring, 11 . pp. 45-52. ISSN 2352-8729. (doi:10.1016/j.dadm.2018.11.001) (KAR id:70171)

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Introduction: The psychometric properties of the social functioning in dementia scale (SF-DEM) over different dementia severities are unknown.

Methods: We interviewed 299 family carers of people with mild, moderate or severe dementia from two UK research sites; examined acceptability (completion rates); conducted exploratory factor analysis and tested each factor’s internal consistency and construct validity.

Results: 285/299 (95.3%) carers completed questionnaires. Factor analysis indicated three distinct factors with acceptable internal consistency: spending time with other people, correlating with overall social function (r=0.56, p<0.001) and activities of daily living (ADLs) (r=-0.48, p<0.001); communicating with other people correlating with ADLs (r=-0.66, p<0.001); and sensitivity to other people correlating with quality of life (r=0.35, p<0.001) and inversely with neuropsychiatric symptoms (r=-0.45, p<0.001). The three factors’ correlations with other domains were similar across all dementia severities.

Discussion: The SF-DEM carer version measures three social functioning domains and has satisfactory psychometric properties in all severities of dementia.

Item Type: Article
DOI/Identification number: 10.1016/j.dadm.2018.11.001
Uncontrolled keywords: Psychometrics, Factor analysis, Social behaviour, Dementia, Behavior Rating Scale
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RT Nursing
Divisions: Divisions > Division of Human and Social Sciences > School of Psychology
Funders: Alzheimer's Society (
Depositing User: Anna Brown
Date Deposited: 19 Nov 2018 08:30 UTC
Last Modified: 04 Mar 2024 19:35 UTC
Resource URI: (The current URI for this page, for reference purposes)

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Brown, Anna.

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Page, Thomas, E..

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