Fig. 2

Bland-Altman plots of the mean bias (difference in agreement) between sodium intake assessed by food frequency questionnaire and 24-h recall (A) Time 1, (B) Time 2 or measured 24-h urinary sodium excretion (C) Time 1, (D) Time 2 in adult participants. The mean bias for each individual is the assessed sodium intake by food frequency questionnaire minus assessed by 24-h recall (A and B) or minus measured 24-h urinary excretion (C and D) and is plotted against the mean of sodium intake assessed by food frequency questionnaire and 24-h recall (A and B) or assessed by food frequency questionnaire and measured 24-h urinary sodium excretion (C and D)