Table 2 Information on the validity and reliability of SF consumption
| Â | Validity | Reliability | Â | ||||
|---|---|---|---|---|---|---|---|
Instrument/Author | Correlation | Mean/median differences | Exact level of agreement, % | Correlation | Mean/median differences | Exact level of agreement, % | Interval between 2 subsequent assessments Comments |
Food4Me FFQ Fallaize et al. 2014 [42] | Food4Me FFQ vs. 4-day WFR Pearson’s crude 0.48 | Food4Me FFQ 45.6 g (SD 15.6) 4-day WFR 24.3 g (SD 10.4) | Exact agreement: 37 | Pearson ‘s crude 0.81 | Food4Me FFQ1: 33.2 g (SD 14.2) Food4Me FFQ2: 32.2 g (SD 14.5) | Exact agreement: 60 | 4 weeks apart |
Food4Me FFQ Forster et al. 2014 [43] | Food4Me FFQ vs. EPIC Norfolk FFQ Pearson’s crude 0.71 | Food4Me FFQ 36.0 g (SD 16.5) EPIC Norfolk FFQ 24.9 g (SD 10.5) | Exact agreement: 46 | NA | NA | NA | NA |
HAPIEE FFQ Brunner et al. 2001 [75] | HAPIEE FFQ vs. 7-DD Spearman’s rank Men: 0.43 Women: 0.56 | 7DD Men: 38 g (SD 13) Energy adjusted 38 g (SD 9) Women: All: 30 g (SD 11) Energy adjusted 30 g (SD 7) HAPIEE FFQ Men: All 33 g (SD 14) Energy adjusted 33 g (SD 8) Women: All 28 g (SD 12) Energy adjusted 28 g (SD 8) | Exact agreement between 7DD, FFQ and biomarker concentrations Men 7DD: 33 FFQ: 28 Women 7DD: 37 FFQ: 38 Exact agreement between 7DD and FFQ: Men: 40 Women: 41 | NA | NA | NA | NA |
IMMIDIET FFQ Van Dongen et al. 2011 [31] Validation: FFQ vs. five 24 h-dietary recalls | IMMIDIET-FFQ vs. 24-h DR Pearson’s, crude men: 0.21 women: 0.34 | IMMIDIET-FFQ men:56 g. (SD 22 g.) Women: 46 g. (SD 19 g.) 24-h DRmen: 33 g. (SD 9 g.) women: 25 g. (SD 8 g.) | Exact agreement: men: 37 women: 26 | NA | NA | NA | NA |
Northern Sweden FFQ (used by Piqueras et al) Johansson et al. 2002 [72] Validation: 2 FFQ’s and ten 24-h recalls Reproducibility:2 FFQ’s over a one-year interval | Northern Sweden FFQ vs. 24-h DR Pearson’s, crude men: 0.58 women: 0.54 Pearson’s, de-attenuated men: 0.62 women: 0.59 | Northern Sweden FFQ men: 31.6 g. women: 23.4 g. 24-h DR men: 34.8 g. women: 26.6 g. | NA | Northern Sweden FFQ1 vs. FFQ2 Pearson’s, crude men: 0.59 women: 0.70 | NA | NA | one year |
PURE FFQ Dehghan et al. 2012 [49] Validation: 2 FFQ’s and four 24-h recalls Reproducibility: 2 FFQ’s over a one-year interval | FFQ1 vs. DR Pearson’s, crude Urban area: 0.46 Rural area: 0.39 FFQ2 vs. DR Pearson’s, crude Urban area: 0.42 Rural area: 0.33 FFQ1 vs. DR Pearson’s, de-attenuated Urban area: 0.63 Rural area: 0.60 FFQ2 vs. DR Pearson’s, de-attenuated Urban area: 0.58 Rural area: 0.50 | Dietary Recalls Urban area: 25.1 g. Rural area: 20.7 g. FFQ1 Urban area: 25.0 g. Rural area: 36.7 g. FFQ2 Urban area: 22.6 g Rural area: 35.2 g | Exact agreement FFQ1 Urban area: 87,7 Rural area: 74.0 FFQ2 Urban area: 80.8 Rural area: 63.0 | FFQ1 vs. FFQ2 Pearson’s, crude Urban area: 0.54 Rural area: 0.40 ICC Urban area: 0.54 Rural area: 0.38 | NA | NA | one year |