Translation, adaptation and psychometric evaluation of the National Health Interview Survey Cancer Epidemiology Nutrition Knowledge Scale
Keywords:
nutrition knowledge, scales, psychometrics, eating disordersAbstract
Objective
The study aimed to translate and adapt into Portuguese the nutrition knowledge scale applied in the National
Health Interview Survey Cancer Epidemiology and to evaluate its validity and precision.
Methods
The scale was translated, back-translated, and then adapted. Typical foods from the American diet were replaced by other foods that are typical of the Brazilian diet. The questionnaire was administered to 39 women with eating disorders and 57 Dietetics students. The students were expected to have higher scores, which would attest the discriminating validity of the scale. The students were tested twice and a correlation coefficient between test and retest was obtained.
Results
The students scored 10.5 points with a standard deviation of 1.7 points while the patients scored 7.4 points with a standard deviation of 2.6 points (p=0.0000001). Only 1.75% of the students presented low knowledge versus 34.21% of the patients (p<0.005). High knowledge was found among 57.90% of the students and among 13.16% of the patients (p<0.005). Spearman’s correlation coefficient was 0.52 (p=0.00009).
Conclusion
The test fulfilled all the psychometric criteria for validation but its precision needs to be reassessed. The time interval between the first and second test should be smaller. Since the students are still learning, it would be
interesting to apply the scale to dietitians given that their knowledge is more stable.
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Copyright (c) 2023 Fernanda Baeza SCAGLIUSI, Viviane Ozores POLACOW, Táki Athanássios CORDÁS, Desire COELHO, Marle ALVARENGA, Sonia Tucunduva PHILIPPI, Antonio Herbert LANCHA JÚNIOR
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