Cultural adaptation and content validity evidence of the Nutritional Literacy Scale Brazilian version.
Christiane Pineda Zanella, Helena Alves de Carvalho Sampaio, José Wellington Oliveira de Lima and 1 others
PMID 35858028WHAT IT FOUND
The Brazilian version of the Nutritional Literacy Scale was culturally adapted and tested in 1,197 adults.
Five items were removed because they did not discriminate well, leaving a 23-item scale that showed appropriate content and understanding for this population.
Key findings
01Five items were excluded from the final version because they did not demonstrate good discrimination in either age group evaluated.
02The final Brazilian version of the scale showed appropriate content and understanding, with evidence of validity in the target audience.
03Nutrition literacy measured by the scale was unsatisfactory in 36.84% of study participants.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The study only included literate adults aged 18 to 60 years, so the results may not apply to older adults, children, or those with low literacy. The five excluded items were removed due to poor discrimination, which may limit the scale's coverage of certain nutritional topics like fiber and organic food. There are few other validated instruments for nutritional literacy in Brazil, making it difficult to compare this tool's performance against alternatives. The study did not time the application of the NLS-BR, so the practical burden on patients and staff is unknown.
Declared interests
The authors declared that the study received no specific grant from funding agencies in the public, commercial, or not-for-profit sectors. The NLS instrument was obtained free of charge from the original author.
The easy way to misread this
Do not assume the scale is complete or covers all nutritional knowledge. Five items were removed because they did not work well, and the tool is only validated for literate adults aged 18-60. Using it on older adults or those with low literacy may yield invalid results.