Objective: to systematically examine the clinical properties of the Spinal Appearance
Questionnaire (SAQ) in its cross-cultural adaptations in different languages. Methods: The
databases Medline (PubMed), CINAHL, EMBASE, Science Direct, PsycINFO and
WorldWideScience.org. Used for screening studies until July 16, 2022. Records on the
development, evaluation and translations of the SAQ instrument with adolescents in idiopathic
scoliosis were included in this review. In addition, two reviewers defined whether the studies
were eligible, as well as analyzed their psychometric properties of Internal Consistency,
Reliability, Content Validity, Cross-cultural Validity, Construct Validity and Structural
Validity, according to Consensus-based Standards for the Selection of health Measurement
Instruments (COSMIN). The Grading of Recommendations Assessment, Development, and
Evaluation (GRADE), recommendation of modified quality classification was applied for
evidence synthesis. Results: 95 articles were selected by title and abstract. After the removal of duplicates, complete reading and search in the references, there were 13 studies in this review. The original version of the SAQ was described in English and its analysis was made in 2 articles and the instrument was translated into Polish, Canadian French, Simple Chinese, Spanish (Europe), Danish, Traditional Chinese, Portuguese (Brazil), Korean, German, Turkish and Persian. The evidence was moderate for construct validity, low for internal consistency, very low for reliability and cross-cultural validity; the properties of content and structural validity did not present minimum data for classification. Conclusion: The quality of the clinical properties of the SAQ instrument for patients with Adolescent Idiopathic Scoliosis was low, due to the absence of clinical analysis properties or doubtful methodological quality. However, we recommend the instrument for the evaluation of the self-perception of the column in adolescents for its own organizational characteristics, its most current translation in the language if before the others by their sample and organization of statistical tests clearly described, compatible with the general proposal of the research and strengthening the exposures of the studied measurement properties.
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