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Psychometric testing of the Self-Care of Coronary Heart Disease Inventory Version 3.0
Vaughan Dickson, Victoria Iovino, Paolo De Maria, Maddalena Vellone, Ercole Alvaro, Rosaria Di Matteo, Roberta Dal Molin, Alberto Lusignani, Maura Bassola, Barbara Maconi, Antonio
Vaughan Dickson, Victoria
Iovino, Paolo
De Maria, Maddalena
Vellone, Ercole
Alvaro, Rosaria
Di Matteo, Roberta
Dal Molin, Alberto
Lusignani, Maura
Bassola, Barbara
Maconi, Antonio
Abstract
Background
In this updated Self-Care of Coronary Heart Disease Inventory (SC-CHDI) v3.0, items were added to better reflect the theory of self-care of chronic illness and revised based on recent research. The expanded SC-CHDI now reflects the theoretical concepts of self-care maintenance, monitoring, and management.
Objective
The aim of this study was to evaluate the psychometric properties of the SC-CHDI v3.0.
Methods
In a sample of adults with coronary heart disease, we tested the SC-CHDI v3.0 validity with confirmatory factor analysis. Reliability was calculated using Cronbach α, factor score determinacy coefficient, and global reliability index for multidimensional scales, with values > 0.70 considered adequate.
Results
The sample (n = 205) was predominantly male (79%) with a mean age of 65.3 ± 11.1 years. The self-care maintenance scale encompassed 2 distinct behaviors, namely, “illness related behaviors” and “health promoting behaviors,” which reflect consulting and autonomous dimensions, respectively. The goodness-of-fit indices were adequate: χ2(25, N = 205) =31.86, P = .16, comparative fit index = 0.97, Tucker-Lewis Index = 0.95, root mean square error of approximation = 0.04 (90% confidence interval, 0.00–0.07), P = .705, and standardized root mean square residual = 0.045. Analysis of the new self-care monitoring scale yielded a single factor; goodness-of-fit indices were excellent: χ2(12, N = 205) =11.56, P = .48, comparative fit index = 1.00, Tucker-Lewis Index = 1.00, root mean square error of approximation < 0.001 (90% confidence interval, 0.000–0.07), P = .86, and standardized root mean square residual = 0.02. The self-care management scale had 2 dimensions of autonomous and consulting behavior with strong goodness-of-fit indices: χ2(7, N = 205) =6.57, P = .47, comparative fit index = 1.00, Tucker-Lewis Index = 1.00, root mean square error of approximation ≤ 0.001 (90% confidence interval, 0.00–0.08), P = .76, and standardized root mean square residual = 0.02. Reliability estimates were ≥0.80 for all scales.
Conclusions
Our testing suggests that the SC-CHDI v3.0 is a sound measure of the essential elements of self-care for adults with coronary heart disease.
Keywords
coronary heart disease, psychometric testing, self-care
Date
2023
Type
Journal article
Journal
Journal of Cardiovascular Nursing
Book
Volume
38
Issue
4
Page Range
E131-E140
Article Number
ACU Department
Mary MacKillop Institute for Health Research
Faculty of Health Sciences
Faculty of Health Sciences
Collections
Relation URI
Source URL
Event URL
Open Access Status
License
All rights reserved
File Access
Controlled