Introduction: Neck and back pain represent an important public health problem, which is increasingly occurring in children and adolescents. Since back pain in youth is an important predictor of pain in adulthood, early recognition of the prevalence, intensity and consequences of pain is of key importance. This requires a standardized and reliable measurement tool that would also be useful in Slovenia. Purpose: The purpose of the master thesis was to translate and transculturally adapt the Young Spine Questionnaire and instructions for use into the Slovenian language, assess the suitability for subjects and investigators, and verify the reliability of the questionnaire on a sample of children and adolescents aged nine to 12 years. Methods: The translation and adaptation were carried out according to the recommendations of Beaton et al. (2000) using the process of translation, translation synthesis, back translation into English and pilot testing. 60 primary school students were included in the study. Ten physiotherapists assessed the usefulness of the questionnaire and instructions. Reliability was verified by a one-week re-test with the Intraclass Correlation Coefficient and internal consistency with Cronbach's α. Results: The internal consistency of the entire questionnaire was close to the acceptance limit (Cronbach's α between 0.673 and 0.684). The reliability of the entire questionnaire was moderate (ICC = 0.64). The highest level of reliability was achieved by questions about pain intensity and frequency, while reliability was lower for questions about prevalence and family history. Children rated the questionnaire as understandable and easy to use (average score 4.61/5). Physiotherapists rated its usefulness lower (3.72/5), mainly due to the time-consuming manual scoring and limited diagnostic value. Discussion and conclusion: Based on the results of the pilot study, we can conclude that the Slovenian translation of the questionnaire is understandable and suitable for the target population, with moderate reliability of assessment, which is attributed to the variable nature of childhood pain. The questionnaire is more suitable for epidemiological research on larger samples than for direct clinical diagnostics. Minor content adjustments and further research on a larger and more representative sample are needed to improve its practical value.
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