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Psychometric validation of the Self-Care Inventory-Revised (SCI-R) in UK adults with type 2 diabetes using data from the AT.LANTUS follow-on study.

Khagram, Leena, Martin, Colin R., Davies, Melanie J. and Speight, Jane 2013, Psychometric validation of the Self-Care Inventory-Revised (SCI-R) in UK adults with type 2 diabetes using data from the AT.LANTUS follow-on study., Health and quality of life outcomes, vol. 11, no. 24, pp. 1-9, doi: 10.1186/1477-7525-11-24.

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Title Psychometric validation of the Self-Care Inventory-Revised (SCI-R) in UK adults with type 2 diabetes using data from the AT.LANTUS follow-on study.
Author(s) Khagram, Leena
Martin, Colin R.
Davies, Melanie J.
Speight, JaneORCID iD for Speight, Jane orcid.org/0000-0002-1204-6896
Journal name Health and quality of life outcomes
Volume number 11
Issue number 24
Start page 1
End page 9
Total pages 9
Publisher BioMed Central
Place of publication London, England
Publication date 2013-02
ISSN 1477-7525
Keyword(s) self-care
type 2 diabetes
psychometric validation
questionnaire
self-care
self-management
SCI-R
AT.LANTUS trial
Summary Background:
Achieving optimal outcomes in type 2 diabetes (T2DM) involves several demanding self-care 
behaviours, e.g. managing diet, activity, medications, monitoring glucose levels, footcare. The Self-Care Inventory-Revised (SCI-R) is valid for use in people with T2DM in the US. Our aim was to determine its suitability for use in the UK.
Methods:
353 people with T2DM participated in the AT.LANTUS Follow-on study, completing measures of diabetes self-care (SCI-R), generic and diabetes-specific well-being (W- BQ28), and diabetes treatment satisfaction (DTSQ). Statistical analyses were conducted to explore structure, reliability, and validity of the SCI-R.
Results:
Principal components analysis indicated a 13-item scale (items loading >0.39) with satisfactory internal consistency reliability (α = 0.77), although neither this model nor any alternatives were confirmed in the confirmatory factor analysis. Acceptability was high (>95% completion for all but one item); ceiling effects were demonstrated for six items. As expected, convergent validity (correlations between self-care behaviours) was found for few items. Divergent validity was supported by expected low correlations between SCI-R total and well-being (rs = 0.02-0.21) and treatment satisfaction (rs = 0.29). Known-groups validity was partially supported with significant differences in SCI-R total by HbA1c (≤7.5% (58 mmol/mol): 72 ± 11, >7.5% (58 mmol/mol): 68 ± 14, p < 0.05) and diabetes duration (≤16 years: 67 ± 13, >16 years: 71 ± 12, p < 0.001) but not by presence/absence of complications or by insulin treatment algorithm.
Conclusions:
The SCI-R is a brief, valid and reliable measure of self-care in people with T2DM in the UK. However, ceiling effects raise concerns about its potential for responsiveness in clinical trials. Individual items may be more useful clinically than the total score.
Language eng
DOI 10.1186/1477-7525-11-24
Field of Research 170106 Health, Clinical and Counselling Psychology
111712 Health Promotion
111714 Mental Health
Socio Economic Objective 920401 Behaviour and Health
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, BioMedCentral
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055994

Document type: Journal Article
Collections: School of Psychology
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Created: Thu, 12 Sep 2013, 17:18:04 EST by Claudia Gasch

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.