Reliability, validity and factor structure of the Appraisal of Self‐Care Agency Scale – Revised (ASAS‐R)

Journal of Evaluation in Clinical Practice - Tập 16 Số 6 - Trang 1031-1040 - 2010
Valmi D. Sousa1, Jaclene A. Zauszniewski2, Sandra Bergquist‐Beringer3, Carol M. Musil4, Jane B. Neese5, Ala’a F. Jaber6
1School of Nursing, The University of Kansas, Kansas City, Kansas 66160, USA.
2Kate Hanna Harvey Professor in Community Health Nursing, Associate Dean for Doctoral Education and PhD Program Director, Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, OH, USA
3Associate Professor
4Professor, Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, OH, USA
5Associate Dean for Academic Affairs and Associate Professor, College of Health and Human Services, The University of North Carolina at Charlotte, Charlotte, NC, USA
6Graduate Research Assistant, School of Nursing, The University of Kansas, Kansas City, Kansas, KS, USA

Tóm tắt

Abstract

Rationale, aims and objectives  Self‐care agency is a fundamental concept in nursing and health care research. Having self‐care agency enhances an individual's health‐promoting behaviours and/or specific capabilities for chronic disease self‐management. The purpose of this study was to continue the development and psychometric testing of the Appraisal of Self‐Care Agency – Revised (ASAS‐R).

Methods  A cross‐sectional methodological design was used to examine the reliability, validity and factor structure of the ASAS‐R among individuals from the general population. The sample consisted of 629 adults who were randomly selected to conduct an exploratory factor analysis (EFA; n = 240) and a confirmatory factor analysis (CFA; n = 389) of the scale. A demographic questionnaire, the ASAS‐R and the Health‐Promoting Lifestyle Profile (HPLP‐II) were the measures used to collect the data.

Results  The final 15‐item three‐factor ASAS‐R had an overall Cronbach's alpha (α) of 0.89. The three factors extracted, rotated and scored in this study were labelled: having power for self‐care, developing power for self‐care and lacking power for self‐care. All inter‐items and item‐to‐total correlations met recommended criteria of r = 0.30 to r = 0.70, except for one of the items that had an item‐to‐total correlation of 0.71, slightly exceeding the maximum recommended item‐to‐total correlation. The three factors had Cronbach's alphas of 0.86, 0.83 and 0.79, respectively. The three factors together explained 61.7% of the scale items variance. Each item of the scale had a strong factor loading ranging from 0.52 to 0.81. All measures of model fit exceeded the recommended criteria, indicating that the 15‐item ASAS‐R had a very good fit (χ2/d.f. = 1.97, GFI = 0.94, AGFI = 0.92, CFI = 0.96, TLI = 0.95, RMSEA = 0.05, RMR = 0.05 and the PCLOSE = 0.48).

Conclusions  The 15‐item three‐factor ASAS‐R is a short, reliable and valid instrument to measure self‐care agency among individuals from the general population, but further psychometric evaluation is needed among individuals with chronic diseases, especially those with diabetes mellitus.

Từ khóa


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Journal of Evaluation in Clinical Practice

Tập 16 Số 6

1031-1040

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