• Andrés Pierobon, Pablo Oscar Policastro, Santiago Soliño, Ben Darlow, Mauro Andreu, Gabriel Adrián Novoa, Ignacio Agustín Raguzzi, and Federico José Villalba.
• Physical Therapy Unit, Durand Hospital, Buenos Aires City, Argentina; KINÉ- Kinesiología Deportiva y Funcional Sports Clinic, Buenos Aires City, Argentina. Electronic address: andipierobon@hotmail.com.
• Musculoskelet Sci Pract. 2020 Apr 1; 46: 102125.

Backgroundlow back pain (LBP) is the main cause of years lived with disability worldwide. Psychosocial factors have been shown to be good predictors of persistent LBP. Within these, unhelpful beliefs about the back seem to be important in the development and chronicity of the symptoms. The Back Pain Attitudes Questionnaire (Back-PAQ) is an instrument that explores beliefs about the back that has been validated for people with and without back pain and healthcare professionals. However, until now, it has not been translated and validated for the Argentine population.Objectivetranslate into Spanish, cross-cultural adapt and validate the Back-PAQ for the Argentine population with and without back pain.Study Designstudy of diagnostic accuracy/assessment scale.Methodsthe study was carried out in three consecutive phases: translation, cross-cultural adaptation and validation. We included Argentinians aged 18 years or more. We used the Back-PAQ, modified Fear Avoidance Beliefs Questionnaire (mFABQ) and the Global Rating of Change (GROC) scale to assess the psychometric properties.Resultsthree hundred and seventy-two participants were included for the analysis. The time taken to answer and score the questionnaire was 5.6 and 1.6 min, respectively. Neither a ceiling nor a floor effect was observed. Internal consistency was 0.76. One hundred and eighty-six participants were considered stable. Test-retest reliability was 0.90. A weak correlation (0.33) was found between the Back-PAQ and the mFABQ.Conclusionthe Argentine version of the Back-PAQ is a viable, reliable and valid tool for the assessment of the back beliefs of the Argentine population.Copyright © 2020 Elsevier Ltd. All rights reserved.

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