Fig. 1.

Bland–Altman plots to assess the relative agreement for (a) percentage of energy from protein, (b) percentage of energy from carbohydrates and (c) percentage of energy from fat between the Scottish Collaborative Group (SCG) FFQ (version 6.6) and a 7 d, non-weighed food diary in healthy adults aged 18–65 years living in Scotland (forty men and fifty-six women), September 2013–June 2014. The difference in percentage of energy (PerE_diff) between the SCG FFQ and the food diary is plotted v. the mean percentage of energy from the two methods (PerE_mean), where —— represents the mean difference (bias) and – – – – – represent the limits of agreement (CHO, carbohydrates)