Maria-Carolina S Ferreira-Sae|Maria Cecília Bueno Jayme Gallani|Wilson Nadruz|Rahul Rodrigues|Kleber G. Franchini|Poliana Coelho Cabral|Maria Lilian Sales
Reliability and validity of a semi-quantitative FFQ for sodium intake in low-income and low-literacy Brazilian hypertensive subjects
Universidade Estadual de Campinas (UNICAMP)|Universidade Estadual de Campinas (UNICAMP)|Universidade Estadual de Campinas (UNICAMP)|Universidade Estadual de Campinas (UNICAMP)|Universidade Estadual de Campinas (UNICAMP)|Universidade Federal de Pernambuco|Universidade Estadual de Campinas (UNICAMP)
assess reliability validity ffq evaluate dietary patterns na consumption among lowincome lowliteracy brazilian hypertensive subjectsthe initial ffq submitted content analysis pretest administered fifteen subjects reliability evaluated according reproducibility criterion interviewer administration ffq twice within 15 interval validity assessed 24 h recall 132 subjects 3 diet record 121 subjects biomarker 24 h urinary na 121 subjects test correlation biomarker discretionary salt added ffq na valuesa large urban teaching hospital southeastern brazilthe study based 132 randomly selected subjects eightythree women fortynine men aged 18 85 yearskappa coefficients ranged 079 098 confirming reproducibility ffq correlation urinary na excretion ffq 24 h recall general sample although significant correlations observed methods summed 24 h recall discretionary salt ffq 032 p 001 addition discretionary salt significantly improved biomarkerbased ffq validity correlation coefficients varying 019 general sample 031 female subsamplethe developed ffq demonstrated satisfactory evidence validity reliability used important complementary tool evaluation na intake among brazilian hypertensive subjects