Fig 1.
Example page from food atlas– 7 portion photographs for estimates of amount served and leftover.
Fig 2.
Example page from food atlas—guide photograph.
Table 1.
Recruitment and demographics of participants completing the study.
Table 2.
Agreement of estimates of portion size using YPFA with weighed food diaries—by age group and respondent.
Fig 3.
Pre-school parents—Bland-Altman plot showing estimated weight using YPFA compared to weighed diary.
Note the data points show the individual estimate of food weight using the YPFA divided by the weight recorded for that food in the weighed diary. A value >1 indicates overestimation of portion size using the YPFA and a value of <1 indicates underestimation using the YPFA. If the mean line is at 1 this would indicate that there is no bias of one method relative to the other, and the degree of agreement at the group level is indicated by the limits of agreement, within which 95% of observations lie.
Fig 4.
Primary school children—Bland-Altman plot showing estimated weight using YPFA compared to weighed diary.
Fig 5.
Primary school parents—Bland-Altman plot showing estimated weight using YPFA compared to weighed diary.
Fig 6.
Secondary school children—Bland-Altman plot showing estimated weight using YPFA compared to weighed diary.
Fig 7.
Secondary school parents—Bland-Altman plot showing estimated weight using YPFA compared to weighed diary.
Fig 8.
Histogram displaying the range in the ratio of estimated weight to actual weight for estimates made using YPFA of the amount of food consumed (50% of the total number of estimates lie between the two vertical lines on the graph).
Table 3.
Agreement of estimates of portion size using YPFA with weighed food diaries for day 1 of the food diary compared with day 4.
Table 4.
Agreement of estimates of portion size using YPFA with weighed food diaries—by food type.
Table 5.
Mean ratio of daily energy and nutrient intakes reported by estimated intakes using YPFA to intakes reported by weighed intake.