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Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation

BACKGROUND: The Sense of Competence Questionnaire (SCQ) was originally developed for informal caregivers of patients with diagnosed dementia. In order to study the validity and usefulness of the SCQ when applied to informal caregivers of older adults with dementia symptoms (i.e. cognitive impairment...

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Autores principales: Jansen, Aaltje PD, van Hout, Hein PJ, van Marwijk, Harm WJ, Nijpels, Giel, Gundy, Chad, Vernooij-Dassen, Myrra JFJ, de Vet, Henrica CW, Schellevis, François G, Stalman, Wim AB
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1947979/
https://www.ncbi.nlm.nih.gov/pubmed/17645790
http://dx.doi.org/10.1186/1745-0179-3-11
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author Jansen, Aaltje PD
van Hout, Hein PJ
van Marwijk, Harm WJ
Nijpels, Giel
Gundy, Chad
Vernooij-Dassen, Myrra JFJ
de Vet, Henrica CW
Schellevis, François G
Stalman, Wim AB
author_facet Jansen, Aaltje PD
van Hout, Hein PJ
van Marwijk, Harm WJ
Nijpels, Giel
Gundy, Chad
Vernooij-Dassen, Myrra JFJ
de Vet, Henrica CW
Schellevis, François G
Stalman, Wim AB
author_sort Jansen, Aaltje PD
collection PubMed
description BACKGROUND: The Sense of Competence Questionnaire (SCQ) was originally developed for informal caregivers of patients with diagnosed dementia. In order to study the validity and usefulness of the SCQ when applied to informal caregivers of older adults with dementia symptoms (i.e. cognitive impairment, pre-diagnostic dementia or dementia in its early stages), we investigated the construct validity, feasibility, subscales, homogeneity, and floor and ceiling effects in this new target population. METHODS: A psychometric evaluation was performed among 99 informal caregivers. To investigate construct validity, hypotheses were tested, concerning the association between sense of competence and burden, mental quality of life, depressive symptoms, and mastery. To investigate feasibility, response rate and the proportion of missing data were explored for each item. An exploratory principal component analysis was used to investigate whether the SCQ comprises the three subscales established in previous studies. Homogeneity was assessed for each subscale with Cronbach's α and item-total correlations. Floor and ceiling effects were explored. RESULTS: Most hypotheses on construct validity were rejected. Only the subscale 'consequences of involvement in care' was found to be partly valid. Feasibility: 93 out of 99 persons completed the SCQ. The proportion of unanswered items per item ranged from 0 – 3%. Subscales: the SCQ comprises the three expected subscales. Homogeneity: Cronbach's alpha and item-total correlations of the three subscales were satisfactory. A ceiling effect occurred on the subscale 'satisfaction with the care recipient'. CONCLUSION: The three subscales of the SCQ showed good homogeneity and feasibility, but their validity is insufficient: only the subscale 'consequences of involvement' was found to be partly valid. The two other subscales might not be relevant yet for the new target population, since many of the items on these scales refer to problem behaviour and problematic interactions. Our message to clinicians is not to use these subscales.
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spelling pubmed-19479792007-08-14 Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation Jansen, Aaltje PD van Hout, Hein PJ van Marwijk, Harm WJ Nijpels, Giel Gundy, Chad Vernooij-Dassen, Myrra JFJ de Vet, Henrica CW Schellevis, François G Stalman, Wim AB Clin Pract Epidemiol Ment Health Research BACKGROUND: The Sense of Competence Questionnaire (SCQ) was originally developed for informal caregivers of patients with diagnosed dementia. In order to study the validity and usefulness of the SCQ when applied to informal caregivers of older adults with dementia symptoms (i.e. cognitive impairment, pre-diagnostic dementia or dementia in its early stages), we investigated the construct validity, feasibility, subscales, homogeneity, and floor and ceiling effects in this new target population. METHODS: A psychometric evaluation was performed among 99 informal caregivers. To investigate construct validity, hypotheses were tested, concerning the association between sense of competence and burden, mental quality of life, depressive symptoms, and mastery. To investigate feasibility, response rate and the proportion of missing data were explored for each item. An exploratory principal component analysis was used to investigate whether the SCQ comprises the three subscales established in previous studies. Homogeneity was assessed for each subscale with Cronbach's α and item-total correlations. Floor and ceiling effects were explored. RESULTS: Most hypotheses on construct validity were rejected. Only the subscale 'consequences of involvement in care' was found to be partly valid. Feasibility: 93 out of 99 persons completed the SCQ. The proportion of unanswered items per item ranged from 0 – 3%. Subscales: the SCQ comprises the three expected subscales. Homogeneity: Cronbach's alpha and item-total correlations of the three subscales were satisfactory. A ceiling effect occurred on the subscale 'satisfaction with the care recipient'. CONCLUSION: The three subscales of the SCQ showed good homogeneity and feasibility, but their validity is insufficient: only the subscale 'consequences of involvement' was found to be partly valid. The two other subscales might not be relevant yet for the new target population, since many of the items on these scales refer to problem behaviour and problematic interactions. Our message to clinicians is not to use these subscales. BioMed Central 2007-07-23 /pmc/articles/PMC1947979/ /pubmed/17645790 http://dx.doi.org/10.1186/1745-0179-3-11 Text en Copyright ©2007 Jansen et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Jansen, Aaltje PD
van Hout, Hein PJ
van Marwijk, Harm WJ
Nijpels, Giel
Gundy, Chad
Vernooij-Dassen, Myrra JFJ
de Vet, Henrica CW
Schellevis, François G
Stalman, Wim AB
Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation
title Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation
title_full Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation
title_fullStr Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation
title_full_unstemmed Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation
title_short Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation
title_sort sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: a psychometric evaluation
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1947979/
https://www.ncbi.nlm.nih.gov/pubmed/17645790
http://dx.doi.org/10.1186/1745-0179-3-11
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