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Purpose: To translate, cross-culturally adapt and test the measurement properties of the Örebro Musculoskeletal Pain Screening Questionnaire (ÖMPSQ) short and long versions in Brazilian-Portuguese.Methods: The ÖMPSQ versions were translated, cross-culturally adapted and pretested in 30 patients with acute and subacute non-specific low back pain. Internal consistency, reproducibility (reliability and agreement), construct validity, and ceiling and floor effects were tested in 100 patients. Construct validity was assessed using the Roland-Morris Disability Questionnaire (RMDQ), the Tampa Scale for Kinesiophobia (TSK), and the Pain Numerical Rating Scale.Results: Internal consistency was adequate (ÖMPSQ: Cronbach's alpha = 0.83; ÖMPSQ-short: Cronbach's alpha = 0.72). Reliability was substantial (ÖMPSQ: ICC2,1 0.76; ÖMPSQ-short: 0.78). Standard error of measurement was very good for the ÖMPSQ (5 %) and good for the ÖMPSQ-short (6.7 %); limits of agreement were 13.07 for the ÖMPSQ and 1.37 for the ÖMPSQ-short; and the minimum detectable change was 25.12 for the ÖMPSQ and 15.51 for the ÖMPSQ-short. The ÖMPSQ total score showed a good correlation with the RMDQ (r = 0.73) and the TSK (r = 0.64) and a moderate correlation with pain intensity (current pain: r = 0.36; last 2 weeks: r = 0.37; last episode: r = 0.46). Moreover, ÖMPSQ-short showed a good correlation with RMDQ (r = 0.69) and a moderate correlation with TSK (r = 0.57) and pain (current pain: r = 0.34; last 2 weeks: r = 0.36; last episode: r = 0.54). No ceiling or floor effects were detected in both versions.Conclusion: The Brazilian-Portuguese ÖMPSQ and ÖMPSQ-short showed acceptable measurement properties and provide evidence that the Brazilian-Portuguese versions of ÖMPSQ and ÖMPSQ-short are similar to the original versions. [ABSTRACT FROM AUTHOR]