Measurement properties of the brief resilient coping scale in patients with systemic lupus erythematosus using rasch analysis.
BACKGROUND
Resilience has been defined as the capacity or the ability to rebound from and positively adapt to significant stressors, despite experiences of significant adversity or trauma. To capture to what extent an individual copes with stress in a resilient fashion the Brief Resilient Coping Scale (BRCS) was developed. This tool was validated in people with chronic disease, such as rheumatoid arthritis using standard psychometric techniques of classical test theory, but not yet in patients with Systemic lupus erythematosus (SLE). The aim of this study was to explore the psychometric properties of the Brief Resilient Coping Scale in patients with SLE using Rasch analysis.


METHODS
This study used cross-sectional data. The BRCS was administered to 232 patients with systemic lupus erythematosus. The aspects analyzed were unidimensionality, local independence and differential item functioning (DIF) to construct an interpretative scale of scores with the Rasch model.


RESULTS
Rating scale mode (RSM) showed that the four categories used in the items of the BRCS are properly ordered. The four items provided a good fit to the polytomous Rasch model. Moreover, the parameters were sufficiently separated to measure resilience in patients with SLE. BRCS is a unidimensional scale (eigenvalue = 1.843) of resilience and the items were locally independent. There was no DIF between males and females in the sample. Only marginally significant differences depending on the level of education were found. The BRCS showed adequate discriminant validity between groups of scores.


CONCLUSIONS
BRCS is a suitable scale for measuring resilience in patients with SLE. This scale might be useful for clinicians to obtain information concerning the degree of resilience that each patient has, allowing individuals with low resilience to be identified who need interventions aimed at developing coping skills.
Department of Basic Psychology and Methodology, Faculty of Psychology, Campus of Espinardo, University of Murcia, 30100, Murcia, Spain. jlpina@um.es.
José-Antonio
http://orcid.org/0000-0003-1347-7759
JA
López-Pina
Department of Physical Therapy, University of Murcia, Murcia, Spain.
Ana-Belén
AB
Meseguer-Henarejos
Department of Public Health, University of Murcia, Murcia, Spain.
Juan-José
JJ
Gascón-Cánovas
Department of Public Health, University of Murcia, Murcia, Spain.
Dérlis-Julián
DJ
Navarro-Villalba
Vanderbilt University, Nashville, USA.
Vaughn G
VG
Sinclair
Vanderbilt University, Nashville, USA.
Kenneth A
KA
Wallston
D000223:Adaptation, Psychological; D000328:Adult; D000367:Age Factors; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D011594:Psychometrics / Q000379:methods*; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D012737:Sex Factors; D012959:Socioeconomic Factors; D013030:Spain; D013315:Stress, Psychological; D011795:Surveys and Questionnaires
Quality of life; Rasch analysis; Resilient coping; Systemic lupus erythematosus