The German version of the body image scale: Validation and item response analysis in cancer patients.

Autor: Hartung TJ; Department of Medical Psychology and Medical Sociology, University Medical Center Leipzig, Leipzig, Germany; Department of Neurology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany. Electronic address: tim.hartung@charite.de., Friedrich M; Department of Medical Psychology and Medical Sociology, University Medical Center Leipzig, Leipzig, Germany., Esser P; Department of Medical Psychology and Medical Sociology, University Medical Center Leipzig, Leipzig, Germany., Mehnert-Theuerkauf A; Department of Medical Psychology and Medical Sociology, University Medical Center Leipzig, Leipzig, Germany., Lehmann-Laue A; Department of Medical Psychology and Medical Sociology, University Medical Center Leipzig, Leipzig, Germany., Letsch A; Department of Hematology and Oncology, Campus Benjamin Franklin, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany; Department of Medicine II, Hematology and Oncology, University Hospital Schleswig-Holstein, Kiel, Germany., Rose M; Department of Psychosomatic Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Department of Quantitative Health Sciences, Medical School, University of Massachusetts, Amherst, MA, USA., Fendel U; Department of Psychosomatic Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
Jazyk: angličtina
Zdroj: Journal of psychosomatic research [J Psychosom Res] 2023 Feb; Vol. 165, pp. 111129. Date of Electronic Publication: 2022 Dec 23.
DOI: 10.1016/j.jpsychores.2022.111129
Abstrakt: Objective: To translate the cancer-specific Body Image Scale (BIS) into German and assess its psychometric properties.
Methods: The BIS was translated in accordance with current guidelines. In a prospective, cross-sectional two center study (psychosocial counselling center for cancer patients Leipzig, oncological inpatient ward Berlin), we assessed composite reliability and factor structure using confirmatory factor analysis. Additional item response theory (IRT) modelling was performed. Convergent validity was assessed via correlation with the Body Appreciation Scale (BAS) as well as psychological symptom burden (PHQ-9, GAD-2 and Distress Thermometer). Discriminant validity was assessed via demographic and clinical group comparisons.
Results: 677 patients participated (response rate 78%). Composite reliability was 0.95 and the one-factor structure was confirmed (standardized root mean square residual = 0.051, average variance extracted ≥50%, no indications of local dependence). In IRT models, all items had a discriminating power above the established threshold of b = 0.5 and relatively high "difficulty" parameters (b = 0.89-2.06). The BIS was negatively correlated with the BAS (rho = -0.62, p < 0.001) and positively with psychological symptom burden (e.g. PHQ-9: rho = 0.49, p < 0.001). Patients who were younger, female, had undergone chemotherapy, radiotherapy or surgery and those who were distressed by fatigue, their appearance or sexual problems had significantly higher BIS scores.
Conclusion: The German version of the BIS is a valid tool to assess BID in patients with cancer that is now available for clinical or research contexts.
Competing Interests: Declaration of Competing Interest The authors have declared no conflict of interest.
(Copyright © 2022 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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