Cross-cultural Adaptation of the Body Satisfaction and Global Self Perception Questionnaire for Subjects with Non-specific Musculoskeletal Disorders

Abstract
Background: Assessing patient’s cognitions and emotions about their physical body is an important part of rehabilitation planning, as musculoskeletal disorders can lead to a change in bodily perceptions.

Methods: This study explores the validity and reliability of the Body Satisfaction and Global Self-Perception Questionnaire (QSCPGS)] in the Spanish population. In addition to calculating Cronbach’s alpha, we conducted Exploratory Factor Analysis and Confirmatory Factor Analyses to test the scale’s validity. We then conducted a test–retest and longitudinal measurement invariance test to explore our measure’s reliability.

Results: Our final sample consisted of 147 subjects with non-specific musculoskeletal disorders (M = 32 years, SD = 15.06), who provided two data points in a 30-day period. A reduced, four-factor model fit the data better [(χ2 = 92.51*; df = 71; df = χ2/df = 1.30; RMSEA= .04; CFI = .95; TLI = .94; SRMR = .05; WRMR = .84)] than any other model. The re-test validity analyses revealed that the four-factor model was stable over time. Finally, the reduced scale correlated with the SF-36 Quality of Life inventory and participants’ BMI.

Conclusions: The QSCPGSe (Spanish version QSCPGS) is a reliable and effective tool for measuring body image perceptions that are more accurate than the original scale.

Keywords: Body Satisfaction, Questionnaire, Global Self Perception, Musculoskeletal.