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An assessment of the construct validity of the ASCOT measure of social care-related quality of life with older people

Malley, Juliette, Towers, Ann-Marie, Netten, Ann, Brazier, John, Forder, Julien E., Flynn, Terry (2012) An assessment of the construct validity of the ASCOT measure of social care-related quality of life with older people. Health and Quality of Life Outcomes, 10 (21). ISSN 1477-7525. (doi:10.1186/1477-7525-10-21) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:32435)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL
http://dx.doi.org/10.1186/1477-7525-10-21

Abstract

Background

The adult social care outcomes toolkit (ASCOT) includes a preference-weighted measure of social care-related quality of life for use in economic evaluations. ASCOT has eight attributes: personal cleanliness and comfort, food and drink, control over daily life, personal safety, accommodation cleanliness and comfort, social participation and involvement, occupation and dignity. This paper aims to demonstrate the construct validity of the ASCOT attributes.

Methods

A survey of older people receiving publicly-funded home care services was conducted by face-to-face interview in several sites across England. Additional data on variables hypothesised to be related and unrelated to each of the attributes were also collected. Relationships between these variables and the attributes were analysed through chi-squared tests and analysis of variance, as appropriate, to test the construct validity of each attribute.

Results

301 people were interviewed and approximately 10% of responses were given by a proxy respondent. Results suggest that each attribute captured the extent to which respondents exercised choice in how their outcomes were met. There was also evidence for the validity of the control over daily life, occupation, personal cleanliness and comfort, personal safety, accommodation cleanliness and comfort, and social participation and involvement attributes. There was less evidence regarding the validity of the food and drink and dignity attributes, but this may be a consequence of problems finding good data against which to validate these attributes, as well as problems with the distribution of the food and drink item.

Conclusions

This study provides some evidence for the construct validity of the ASCOT attributes and therefore support for ASCOT's use in economic evaluation. It also demonstrated the feasibility of its use among older people, although the need for proxy respondents in some situations suggests that developing a version that is suitable for proxies would be a useful future direction for this work. Validation of the instrument on a sample of younger social care users would also be useful.

Item Type: Article
DOI/Identification number: 10.1186/1477-7525-10-21
Uncontrolled keywords: social care; quality of life; ASCOT; validity; long-term care
Subjects: H Social Sciences > H Social Sciences (General)
Divisions: Divisions > Division for the Study of Law, Society and Social Justice > School of Social Policy, Sociology and Social Research > Personal Social Services Research Unit
Depositing User: Jane Dennett
Date Deposited: 13 Dec 2012 16:14 UTC
Last Modified: 16 Nov 2021 10:10 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/32435 (The current URI for this page, for reference purposes)
Towers, Ann-Marie: https://orcid.org/0000-0003-3597-1061
Netten, Ann: https://orcid.org/0000-0003-2567-8523
Forder, Julien E.: https://orcid.org/0000-0001-7793-4328
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