Cross-cultural adaptation and psychometric properties of the Indonesian version for quality of life among breast cancer patients

Abstract

BackgroundBreast cancer is one of the most important health problems worldwide. Quality of life (QoL) is an important indicator to evaluate symptoms in cancer patients, including those with breast cancer. Culturally suitable, valid, reliable, and appropriate instruments to measure the QoL of breast cancer patients are needed, which is still rare in Indonesia. This study aimed to translate the EORTC QLQ-BR45 instrument into Indonesian and evaluate its psychometrics.MethodsA cross-sectional study was performed on 635 patients conveniently selected from the oncology department in referral hospital. The first phase of this study involved translation of the existing EORTC QLQ-BR45 into Indonesian, and in the second phase, we evaluated its psychometric properties. Construct validity was evaluated using confirmatory factor analysis (CFA). Criterion validity was examined according to the association between disease stage and Karnofsky Performance Scale (KPS).ResultsA total of 635 (99.00%) completed the EORTC QLQ-BR45 successfully. The instrument indicated good readability and high content validity. All Cronbach's alpha coefficients were satisfactory (overall value, 0.87). For construct validity, patients with KPS ≥80% did better than those with KPS ≤70% as did two multi-item scales in functional scales (body image and breast satisfaction) and five multi-item scales in symptom scales (systemic therapy side effects, endocrine therapy, and arm, breast, and endocrine sexual symptoms). Body image score of late-stage patients was significantly higher. CFA indicated that the nine-factor structure of the Indonesian EORTC QLQ-BR45 was a good fit for the data.ConclusionThe Indonesian EORTC QLQ-BR45 questionnaire is reliable and valid with good psychometric properties, thus can be used for breast cancer patients in Indonesia.

Cross-Cultural Adaptation and Psychometric Properties of the Swahili Version of the European Organization for Research and Treatment of Cancer (EORTC) QLQ-BR45 among Breast Cancer Patients in Tanzania

“…First, the English version of EORTC QLQ-BR45 was translated forward and backwards into Swahili to attain the final EORTC QLQ-BR45 Swahili version, which was piloted. Difficult words that emerged during piloting were amended, it was worded [ 19 ] to ensure that it was linguistically and culturally acceptable to all levels of education in the field, and finally, the tool was approved by the EORTC translation unit.…”

“…In 2020, a new version with 22 additional items was developed, the EORTC QLQ-BR45 [ 16 ]. The EORTC QLQ-BR45 is standardized in 19 languages [ 17 , 18 , 19 ]. Few studies in Tanzania used EORTC-QLQ-C-30 and none utilized the EORTC-QLQ-BR23 or the BR-45 modules.…”

Validity and reliability of a Chinese version of the Bergen Work Addiction Scale

“…To verify the structural model of the BWAS, CFA was conducted with a weighted least squares, mean, and variance adjusted estimator that enables treatment of ordinal data in Mplus, version 7.4 ( Schreiber, 2008 ; Andreassen et al, 2011 ; Hair et al, 2019 ; Solikhah et al, 2023 ). In the CFA, model fitness was determined based on the comparative fit index (CFI), Tucker–Lewis index (TLI), and root-mean-square error of approximation (RMSEA) value; all three of these indices are well established as effective and reliable indicators ( Schreiber, 2008 ; Andreassen et al, 2011 ; Hair et al, 2019 ; Solikhah et al, 2023 ). The criteria for an acceptable model fit were: CFI > 0.90, TLI > 0.90, and RMSEA <0.08 ( Schreiber, 2008 ; Andreassen et al, 2011 ; Hair et al, 2019 ; Solikhah et al, 2023 ).…”

“…In the CFA, model fitness was determined based on the comparative fit index (CFI), Tucker–Lewis index (TLI), and root-mean-square error of approximation (RMSEA) value; all three of these indices are well established as effective and reliable indicators ( Schreiber, 2008 ; Andreassen et al, 2011 ; Hair et al, 2019 ; Solikhah et al, 2023 ). The criteria for an acceptable model fit were: CFI > 0.90, TLI > 0.90, and RMSEA <0.08 ( Schreiber, 2008 ; Andreassen et al, 2011 ; Hair et al, 2019 ; Solikhah et al, 2023 ). As an additional measure of model fitness, we calculated the quotient of the minimum discrepancy, Ĉ, and degrees of freedom (DF), written Cmin/DF.…”

Validity and reliability of a Chinese language suicide screening questionnaire-observer rating (CL-SSQ-OR) assessment for children/adolescents

“…For example, the Ask Suicide-Screening Questions (ASQ) ( 21 ) was introduced into the Korean language by Kim et al from the National Institute of Mental Health (United States), the Cluster Headache Impact Questionnaire (CHIQ) was translated into the Italian language by Onofri et al (United States), and the Central Sensitization Inventory (CSI-9) was translated into the Chinese language by Liang et al (United States). Moreover, all of these tools were subjected to validity and reliability tests in the country into which they were introduced ( 34 – 36 ). Consequently, to introduce the SSQ-OR into China, we first tested the validity and reliability of the Chinese language version of this tool.…”