Cross-cultural Adaptation into Brazilian Portuguese of the Dietary Sodium Restriction Questionnaire (DSRQ)

Background: Sodium restriction is a non-pharmacological measure often recommended to patients with heart failure (HF). However, adherence is low, being among the most common causes of HF decompensation. The Dietary Sodium Restriction Questionnaire (DSRQ) aims at identifying factors that affect adherence to dietary sodium restriction by patients with HF. In Brazil, there are no instruments to assess these factors. Objective: Perform the cross-cultural adaptation of DSRQ. Methods: Methodological study that involved the following steps: translation, synthesis, back-translation, review by an expert committee, pretest of the final version and analysis of interobserver agreement. In the pretest, items and their understanding were evaluated, as well as internal consistency by Cronbach's alpha. The instrument was simultaneously and independently applied by two researchers and the kappa test was used for agreement analysis. Results: Only one question underwent major semantic and/or cultural alteration. At the pretest, Cronbach's alpha for the total obtained was 0.77; for the Attitude, Subjective Norm and Behavioral Control scales were obtained, respectively: 0.66, 0.50 and 0.85. At the agreement step, the Kappa was calculated for 12 of the 16 questions, with values ranging from 0.62 to 1.00. In items for which the calculation was not possible, the incidence of equal responses ranged from 95% to 97.5%. Conclusion: Based on the cross-cultural adaptation of DSRQ, it was possible to propose a version of the questionnaire for further evaluation of psychometric properties. (Arq Bras Cardiol 2012; 98( 1):70-75)