Elaboração e verificação da validade e confiabilidade de um instrumento de letramento em nutrição entre pessoas com diabetes.

Background: The literacy about nutrition of people with diabetes is important since healthy eating can improve the life quality of these people. Objective: The objective of this study was to create an instrument called "Nutrition Literacy among people with Diabetes (NLD)" and evaluate its validity, reliability and interpretability. Method: Methodological study with verification of content validity; pre-test; reliability estimation (internal consistency: Cronbach's alpha; reproducibility: kappa-K, Intraclass Correlation Coefficient - ICC); estimation of the validity of concurrent criterion and interpretability made by counting the correct words associations with scores from 0 to 24 (cut = 18) and hypothesis test in sample for infinite population through logistic regression p=0.05; (OR / CI 95%). Results: The content validity was satisfactory. Reliability (alpha = 0.68, K=0.60 and CCI = 0.68) was good. Regarding the concurrent validity, a correlation between NLD and schooling (rs = 0.88, p = 0.000) was found. From the 212 participants, 75.8% presented NLD> 18. In the hypothesis test, it was found that the higher the schooling, the higher the NLD (1.20 / 1.09-1.31); the NLD was lower among men (0.50 / 0.25-1.01). Conclusion: The NLD was considered valid, reliable and easy to interpret, and it could be used in future research or even in health services that provide assistance to people with diabetes. [ABSTRACT FROM AUTHOR]