Self-Estimated Functional Inability Because of Pain Questionnaire for Athletes: A Reliability and Construct Validity Study.

OBJECTIVE: The purpose of this study was to measure the reliability, internal consistency, construct validity, and floor and ceiling effects of the Brazilian version of the Self-Estimated Functional Inability Because of Pain Questionnaire for athletes (SEFIP-sport). METHODS: This was a validity questionnaire study developed in a university community. Athletes or practitioners of any sport undertaking regular practice (weekly frequency of at least twice a week for at least 6 months), with the ability to read and write in Brazilian Portuguese, were included. We evaluated disability by means of the SEFIP-sport and the Roland-Morris Disability Questionnaire for general pain, pain intensity by means of a numerical rating scale, quality of life by means of the Short-Form Health Survey, and predicted disability by means of the Örebro Musculoskeletal Pain Questionnaire. RESULTS: Two hundred and twenty-one athletes or regular practitioners of sport were recruited and included in the study. We observed adequate values of reliability (κ ≥ 0.40, intraclass correlation coefficient = 0.91), internal consistency (Cronbach's α ≥ 0.81), and correlations (r s ≥ -0.376) of the total SEFIP-sport score with the numerical rating scale; the pain, vitality, and social aspects domains of the Short-Form Health Survey; the Roland-Morris questionnaire; and the Örebro Musculoskeletal Pain Questionnaire. CONCLUSION: The Brazilian Portuguese version of the SEFIP-sport demonstrated adequate psychometric properties for use in athletes.