Fig 1.
FFQ: food frequency questionnaire; FR: food record; B: biomarker (urinary excretion); AI: actual intake; r FFQ FR: bivariate correlation between food frequency questionnaire and reference method; r B FR: bivariate correlation between biomarker and reference method; r FFQ B: bivariate correlation between food frequency questionnaire and biomarker; r FFQ AI: validity coefficient of the food frequency questionnaire; r FR AI: validity coefficient of the reference method; r B AI: validity coefficient of the biomarker.
Table 1.
Sociodemographic characteristics and nutritional status of a subsample of participants in the Longitudinal Study of Adult Health, ELSA-Brasil, 2008–2010, according to gender.
Table 2.
Arithmetic means and standard deviations for sodium (mg) and potassium (mg) intake estimated from the Food Records, Food Frequency Questionnaire and Urinary Excretion of participants in the Longitudinal Study of Adult Health, ELSA-Brasil, 2008–2010.
Table 3.
Pearsons Correlations (r) between the methods intake estimated sodium and potassium for participants in the Longitudinal Study of Adult Health, ELSA-Brasil, 2008–2010.
Table 4.
Correlation coefficients, validity coefficients, validity coefficients with Bootstrap 95% confidence interval and variations in validity coefficients for sodium and potassium, measured from the Food Frequency Questionnaire, Food Records and Urinary Excretion methods for participants in the Longitudinal Study of Adult Health, ELSA-Brasil, 2008–2010.
Table 5.
Agreement of estimated sodium and potassium intake between the Food Frequency Questionnaire, Food Records and Urinary Excretion methods for participants in the Longitudinal Study of Adult Health, ELSA-Brasil, 2008–2010.