Table 2.
Mean of correlation coefficients weighted by the quality score for the FFQ validation studies per EURRECA micronutrients and population group analysed
| Nutrient | Infants and pre‐school children | Children and adolescents | ||||
|---|---|---|---|---|---|---|
| Short‐term intake (<7 days) | Long‐term intake (≥7 days) | Biomarkers | Short‐term Intake (<7 days) | Long‐term intake (≥7 days) | Biomarkers | |
| Vit B12 | 0.48 (3 studies) | NA | NA | NA | NA | NA |
| Folate | NA | NA | NA | NA | NA | NA |
| Vit C | 0.60 (4 studies) | NA | NA | 0.61 (3 studies) | 0.50 (3 studies) | NA |
| Vit D | 0.62 (3 studies) | NA | NA | NA | NA | NA |
| Calcium | 0.65 (8 studies) | NA | NA | 0.51 (8 studies) | 0.47 (5 studies) | NA |
| Iron | 0.62 (4 studies) | NA | NA | 0.38 (3 studies) | NA | NA |
| Zinc | 0.56 (3 studies) | NA | NA | NA | NA | NA |
| Copper | NA | NA | NA | NA | NA | NA |
FFQ, food frequency questionnaire; EURRECA, European Micronutrient Recommendation Aligned; vit, vitamin; NA, not available, less than three studies found.