Validity and Reproducibility of a Food Frequency Questionnaire as a Measure of Recent Dietary Intake in Young Adults
Figure 1
Bland and Altman plot: Difference in total energy intake in kilojoules (kJ) from the DQESV2 and WFR Mean, against the average of the two methods, among (a) males and (b) females.
Horizontal lines represent the mean difference (solid black) and 95% limits of agreement (dotted lines). Grey line represents the regression line for the equation Difference = a+β(Average).