Table 3. Proportion of European adolescents having anaemia, abnormal values of iron indicators, iron sufficiency, iron depletion, ID and IDAa.
| Iron statusc | Total (n=940)b | Boys (n=438)b | Girls (n=502)b | |||
|---|---|---|---|---|---|---|
| n | % | n | % | n | % | |
| Low SF | 210 | 22.4 | 78 | 17.9** | 132 | 26.3 |
| High sTfR | 66 | 7.0 | 30 | 6.9 | 36 | 7.2 |
| Anaemia | 41 | 4.4 | 8 | 1.8** | 33 | 6.6 |
| Classificationd | ||||||
| Iron sufficiency | 705 | 75.2 | 344 | 79.3* | 361 | 71.7 |
| Iron depletion | 167 | 17.6 | 63 | 13.8* | 104 | 21.0 |
| ID | 45 | 4.7 | 18 | 3.9 | 27 | 5.4 |
| IDA | 11 | 1.3 | 2 | 0.5 | 9 | 2.0 |
Abbreviations: ID, iron deficiency; IDA, iron deficiency with anaemia; SF, serum ferritin; sTfR, soluble transferrin receptor.
a
All data were adjusted by a weighing factor to balance the sample according to the theoretical age distribution of the European adolescent population.
b
The count of subjects (n) are reported in the table as unweighted values.
c
Indicators and cutoff values used to identify abnormal values of iron indicators and iron status are reported in Table 1.
d
23 subjects (13 boys and 10 girls) were excluded because of with high values of sTfR and normal values of SF.
*P<0.05; **P<0.01 statistically significant between girls and boys.