Cross-cultural adaptation, content validity, test-retest reproducibility and reliability of the reintegration to normal living index: Brazilian Portuguese version.

OBJECTIVE

To translate and cross-culturally adapt the Reintegration to Normal Living Index into brazilian portuguese, assess the content validity, test-retest reproducibility, and reliability of the instrument in individuals with multiple sclerosis.

METHOD: The process of translation and crosscultural adaptation of the Reintegration to Normal Living Index into brazilian portuguese followed standard guidelines. The study was conducted in three stages: a) cross-cultural adaptation; b) content validity using the experience of individuals with multiple sclerosis; c) reproducibility test-retest (7-day interval) and reliability by assessing internal consistency. The Content Validity Index (CVI), Intraclass Correlation Coefficient (ICC) and Cronbach's alpha were calculated.

RESULTS

Fifty patients with an average diagnosis time of 10.4 (±8.4) years were evaluated. The I-CVI for all statements in the questionnaire was above 0.90. In the analysis of test-retest reproducibility and reliability of the RNLI-BP, excellent ICC (0.911) and Cronbach's Alpha (0.953) were found. The mean score of the Reintegration to Normal Living Index was 76.0 (±23.5) in the first assessment and 76.3 (±25.3) in the second assessment.

CONCLUSION

The Brazilian Portuguese version of the Reintegration to Normal Living Index (RNLI-BP) has content validity, reproducibility and reliability in measuring participation in individuals with multiple sclerosis.