Assessing Cross-Cultural Adaptation of the Spine Oncology Study Group Outcomes Questionnaire 2.0: A Methodological Systematic Review Regard to Consensus-Based Standards for the Selection of Health Measurement Instruments Guideline.

STUDY DESIGN: systematic review of cross-cultural adaptation. OBJECTIVES: SOSGOQ 2.0 was widely used to assess the HRQQOL of patients with spinal metastasis. Due to the lack of methodological quality assessment, it is a challenge to use the questionnaire in routine practice. This study aims to comprehensively evaluate the translation procedures and measurement attributes of SOSGOQ 2.0 according to COSMIN guidelines. METHODS: The literature was reviewed adhering to the PRISMA guidelines. Each translation process and different cultural adaptation methods were classified according to the guidelines for Cross cultural Adaptation Process of Self Reporting Measures, and the methodological quality of the identified research was evaluated according to the consensus based on the selection criteria of health measurement tools. RESULTS: 6 publications finally met the inclusion criteria. As for the evaluation of translation procedures and cross-cultural adaptability, two adaptations did not report the detailed information in translation and cross-cultural adaptation (synthesis, back translation, review by expert committee, pre-test), factor analysis and sample size calculation were only mentioned in two studies, and only one adaptation met the minimum sample size standard. Regard to the methodological quality assessment of measurement attributes, all adaptations completed internal consistency, structural effectiveness and reliability. However, none of the adaptations reported measurement errors and only one reported response sensitivity. CONCLUSIONS: We found that the methodological quality of the current adaptation was uneven, and the report of measurement attribute results was not comprehensive. We recommend higher quality German, Italian and Chinese adaptation.