INTRODUCTION Cross-cultural adaptations of questionnaires in developing countries, such as Brazil, have fostered a major debate involving the fields of economics, health, politics and culture. 1 Today, with the development and dissemination of the Guidelines for the Process of Cross-Cultural Adaptation of Self-Report Measures 2 and of the Consensus-based Standards for the Selection of Health Measurement Instruments (COSMIN), 3 standardization of cross-cultural adaptation relating to culture, language and country is providing positive outcomes within scientific and clinical contexts. Within healthcare sciences, especially in the field of prevention and rehabilitation of musculoskeletal injuries, it is common to use questionnaires to measure self-reported outcomes, mainly in relation to pain and functional disability. 4-6 Among the questionnaires for screening of musculoskeletal injuries, in addition to instruments that were created by researchers for specific evaluations, 7,8 the Nordic Musculoskeletal Questionnaire (NMQ) stands out through its widespread use for locating musculoskeletal pain in diverse populations. 9-12 However, the NMQ does not have a severity score, and it is not possible to use it to make inferences about functional disability. Therefore, as a way to fill this gap, the Self-Estimated Functional Inability because of Pain (SEFIP) questionnaire was developed and published in 1999. This is an instrument created based