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Original Research

Relative Validation of a Four Weeks Retrospective Food Frequency Questionnaire versus 7-Day Paper-Based Food Records in Estimating the Intake of Energy and Nutrients in Adults

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Pages 113-125 | Published online: 23 Jun 2021

Figures & data

Figure 1 Flow chart of the subjects’ recruitment process.

Figure 1 Flow chart of the subjects’ recruitment process.

Table 1 Characteristics of Study Participants by Sex (N=116)

Table 2 Unadjusted and Adjusted Intakes of Energy and Nutrient Intakes from the 7-Day Food Records and 4-Week Retrospective FFQ (n = 116)

Table 3 Adjusted and Unadjusted Spearman’s rho, Percentage of Participants Classified into the Same, Adjacent or Opposite Quartile by the 7-Day Food Records and 4-Week Retrospective FFQ and the Cohen’s Kappa (n = 116)

Figure 2 Bland–Altman plot with the difference in energy and nutrient intakes measured with the 7-day food records and 4 weeks retrospective FFQ plotted against the mean intakes from the two methods. (A) energy intake (kcal); (B) protein intake (g); (C) fat intake (g); (D) carbohydrate intake (g).

Notes: The solid line indicates the regression line, the serried dashed line indicates the mean difference between the methods, while the spaced dashed lines indicate ±1.96 SDs.
Figure 2 Bland–Altman plot with the difference in energy and nutrient intakes measured with the 7-day food records and 4 weeks retrospective FFQ plotted against the mean intakes from the two methods. (A) energy intake (kcal); (B) protein intake (g); (C) fat intake (g); (D) carbohydrate intake (g).

Figure 3 Bland–Altman plots for the difference in fractions of fatty acid intakes measured with the 7-day food records and 4 weeks retrospective FFQ, plotted against the mean intakes from the two methods. (A) SFA intake (g); (B) PUFA intake (g); (C) MUFA intake (g); (D) total sugars intake (g).

Notes: The solid line indicates the regression line, the serried dashed line indicates the mean difference between the methods, while the spaced dashed lines indicate ±1.96 SDs.
Figure 3 Bland–Altman plots for the difference in fractions of fatty acid intakes measured with the 7-day food records and 4 weeks retrospective FFQ, plotted against the mean intakes from the two methods. (A) SFA intake (g); (B) PUFA intake (g); (C) MUFA intake (g); (D) total sugars intake (g).

Table 4 Intakes of the Food Groups as Assessed by 4-Week Retrospective FFQ and 7-Day Food Records Methods (n = 116)

Table 5 Spearman’s rho, Percentage of Participants Classified into the Same, Adjacent or Opposite Quartile by the 7-Day Fooc Records and 4-Week Retrospective FFQ and Cohen’s Kappa (n = 116)