Dementia quality of life instrument: construct and concurrent validity in patients with mild to moderate dementia

S Voigt-Radloff; R Leonhart; M Schützwohl; L Jurjanz; T Reuster; A Gerner; K Marschner; F van Nes; M Graff; M Vernooij-Dassen; M O Rikkert; V Holthoff; M Hüll

doi:10.1111/j.1468-1331.2011.03561.x

Dementia quality of life instrument: construct and concurrent validity in patients with mild to moderate dementia

S Voigt-Radloff, R Leonhart, M Schützwohl, L Jurjanz, T Reuster, A Gerner, K Marschner, F van Nes, M Graff, M Vernooij-Dassen, M O Rikkert, V Holthoff, M Hüll

Research output: Contribution to journal › Article › Academic › peer-review

8 Citations (Scopus)

Abstract

BACKGROUND AND PURPOSE: To translate the Dementia quality of life instrument (DQoL) into German and assess its construct and concurrent validity in community-dwelling people with mild to moderate dementia.

METHODS: Dementia quality of life instrument data of two pooled samples (n=287) were analysed regarding ceiling and floor effects, internal consistency, factor reliability and correlations with corresponding scales on quality of life (Quality of Life in Alzheimer's Disease and SF-12), cognition (Mini-Mental State Examination, Alzheimer's Disease Assessment Scale - cognitive), depression (Cornell Scale for Depression in Dementia) and activities of daily living (Interview of Deterioration in Daily Living Activities in Dementia).

RESULTS: We found no floor effects (<2%), minor ceiling effects (1-11%), moderate to good internal consistency (Cronbach's α: 0.6-0.8) and factor reliability (0.6-0.8), moderate correlations with self-rated scales of quality of life (Spearman coefficient: 0.3-0.6) and no or minor correlations with scores for cognition, depression or activities of daily living (r<0.3). The original five-factor model could not be confirmed.

CONCLUSION: The DQoL can be used in dementia research for assessing positive and negative affect, feelings of belonging and self-esteem. The findings suggest further research to improve the structure of the scales aesthetics, feelings of belonging and self-esteem.

Original language	English
Pages (from-to)	376-384
Journal	European Journal of Neurology
Volume	19
Issue number	3
DOIs	https://doi.org/10.1111/j.1468-1331.2011.03561.x
Publication status	Published - Mar 2012
Externally published	Yes

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Voigt-Radloff, S., Leonhart, R., Schützwohl, M., Jurjanz, L., Reuster, T., Gerner, A., Marschner, K., van Nes, F., Graff, M., Vernooij-Dassen, M., Rikkert, M. O., Holthoff, V., & Hüll, M. (2012). Dementia quality of life instrument: construct and concurrent validity in patients with mild to moderate dementia. European Journal of Neurology, 19(3), 376-384. https://doi.org/10.1111/j.1468-1331.2011.03561.x

Voigt-Radloff, S ; Leonhart, R ; Schützwohl, M ; Jurjanz, L ; Reuster, T ; Gerner, A ; Marschner, K ; van Nes, F ; Graff, M ; Vernooij-Dassen, M ; Rikkert, M O ; Holthoff, V ; Hüll, M. / Dementia quality of life instrument : construct and concurrent validity in patients with mild to moderate dementia. In: European Journal of Neurology. 2012 ; Vol. 19, No. 3. pp. 376-384.

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title = "Dementia quality of life instrument: construct and concurrent validity in patients with mild to moderate dementia",

abstract = "BACKGROUND AND PURPOSE: To translate the Dementia quality of life instrument (DQoL) into German and assess its construct and concurrent validity in community-dwelling people with mild to moderate dementia.METHODS: Dementia quality of life instrument data of two pooled samples (n=287) were analysed regarding ceiling and floor effects, internal consistency, factor reliability and correlations with corresponding scales on quality of life (Quality of Life in Alzheimer's Disease and SF-12), cognition (Mini-Mental State Examination, Alzheimer's Disease Assessment Scale - cognitive), depression (Cornell Scale for Depression in Dementia) and activities of daily living (Interview of Deterioration in Daily Living Activities in Dementia).RESULTS: We found no floor effects (<2%), minor ceiling effects (1-11%), moderate to good internal consistency (Cronbach's α: 0.6-0.8) and factor reliability (0.6-0.8), moderate correlations with self-rated scales of quality of life (Spearman coefficient: 0.3-0.6) and no or minor correlations with scores for cognition, depression or activities of daily living (r<0.3). The original five-factor model could not be confirmed.CONCLUSION: The DQoL can be used in dementia research for assessing positive and negative affect, feelings of belonging and self-esteem. The findings suggest further research to improve the structure of the scales aesthetics, feelings of belonging and self-esteem.",

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author = "S Voigt-Radloff and R Leonhart and M Sch{\"u}tzwohl and L Jurjanz and T Reuster and A Gerner and K Marschner and {van Nes}, F and M Graff and M Vernooij-Dassen and Rikkert, {M O} and V Holthoff and M H{\"u}ll",

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doi = "10.1111/j.1468-1331.2011.03561.x",

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Voigt-Radloff, S, Leonhart, R, Schützwohl, M, Jurjanz, L, Reuster, T, Gerner, A, Marschner, K, van Nes, F, Graff, M, Vernooij-Dassen, M, Rikkert, MO, Holthoff, V & Hüll, M 2012, 'Dementia quality of life instrument: construct and concurrent validity in patients with mild to moderate dementia', European Journal of Neurology, vol. 19, no. 3, pp. 376-384. https://doi.org/10.1111/j.1468-1331.2011.03561.x

Dementia quality of life instrument : construct and concurrent validity in patients with mild to moderate dementia. / Voigt-Radloff, S; Leonhart, R; Schützwohl, M; Jurjanz, L; Reuster, T; Gerner, A; Marschner, K; van Nes, F; Graff, M; Vernooij-Dassen, M; Rikkert, M O; Holthoff, V; Hüll, M.

In: European Journal of Neurology, Vol. 19, No. 3, 03.2012, p. 376-384.

Research output: Contribution to journal › Article › Academic › peer-review

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T2 - construct and concurrent validity in patients with mild to moderate dementia

AU - Voigt-Radloff, S

AU - Leonhart, R

AU - Schützwohl, M

AU - Jurjanz, L

AU - Reuster, T

AU - Gerner, A

AU - Marschner, K

AU - van Nes, F

AU - Graff, M

AU - Vernooij-Dassen, M

AU - Rikkert, M O

AU - Holthoff, V

AU - Hüll, M

PY - 2012/3

Y1 - 2012/3

N2 - BACKGROUND AND PURPOSE: To translate the Dementia quality of life instrument (DQoL) into German and assess its construct and concurrent validity in community-dwelling people with mild to moderate dementia.METHODS: Dementia quality of life instrument data of two pooled samples (n=287) were analysed regarding ceiling and floor effects, internal consistency, factor reliability and correlations with corresponding scales on quality of life (Quality of Life in Alzheimer's Disease and SF-12), cognition (Mini-Mental State Examination, Alzheimer's Disease Assessment Scale - cognitive), depression (Cornell Scale for Depression in Dementia) and activities of daily living (Interview of Deterioration in Daily Living Activities in Dementia).RESULTS: We found no floor effects (<2%), minor ceiling effects (1-11%), moderate to good internal consistency (Cronbach's α: 0.6-0.8) and factor reliability (0.6-0.8), moderate correlations with self-rated scales of quality of life (Spearman coefficient: 0.3-0.6) and no or minor correlations with scores for cognition, depression or activities of daily living (r<0.3). The original five-factor model could not be confirmed.CONCLUSION: The DQoL can be used in dementia research for assessing positive and negative affect, feelings of belonging and self-esteem. The findings suggest further research to improve the structure of the scales aesthetics, feelings of belonging and self-esteem.

AB - BACKGROUND AND PURPOSE: To translate the Dementia quality of life instrument (DQoL) into German and assess its construct and concurrent validity in community-dwelling people with mild to moderate dementia.METHODS: Dementia quality of life instrument data of two pooled samples (n=287) were analysed regarding ceiling and floor effects, internal consistency, factor reliability and correlations with corresponding scales on quality of life (Quality of Life in Alzheimer's Disease and SF-12), cognition (Mini-Mental State Examination, Alzheimer's Disease Assessment Scale - cognitive), depression (Cornell Scale for Depression in Dementia) and activities of daily living (Interview of Deterioration in Daily Living Activities in Dementia).RESULTS: We found no floor effects (<2%), minor ceiling effects (1-11%), moderate to good internal consistency (Cronbach's α: 0.6-0.8) and factor reliability (0.6-0.8), moderate correlations with self-rated scales of quality of life (Spearman coefficient: 0.3-0.6) and no or minor correlations with scores for cognition, depression or activities of daily living (r<0.3). The original five-factor model could not be confirmed.CONCLUSION: The DQoL can be used in dementia research for assessing positive and negative affect, feelings of belonging and self-esteem. The findings suggest further research to improve the structure of the scales aesthetics, feelings of belonging and self-esteem.

KW - Aged

KW - Dementia

KW - Female

KW - Humans

KW - Language

KW - Male

KW - Neuropsychological Tests

KW - Quality of Life

KW - Journal Article

KW - Validation Studies

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DO - 10.1111/j.1468-1331.2011.03561.x

M3 - Article

C2 - 21999841

VL - 19

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JO - European Journal of Neurology

JF - European Journal of Neurology

SN - 1351-5101

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