TABLE 4.
Prevalence of iodine inadequacy by age and pregnancy status in female members of the “intake” population, based on estimated usual iodine intake from various sources1
| Prevalence of iodine inadequacy,2 % |
||||
| Iodine from foods and DS | Iodine from foods, DS, and DW | Iodine from foods, DS, DW, and SC | Iodine from foods, DS, DW, SC, and ST | |
| Nonpregnant | ||||
| 1–3 y | 0.5 ± 0.2 | 0.5 ± 0.2 | 0.3 ± 0.1 | 0.2 ± 0.1 |
| 4–8 y | 0.1 ± 0.1 | 0.1 ± 0.1 | 0.0 ± NA | 0.0 ± NA |
| 9–13 y | 0.6 ± 0.3 | 0.5 ± 0.3 | 0.2 ± 0.1 | 0.0 ± NA |
| 14–18 y | 7.7 ± 1.6 | 6.3 ± 1.4 | 3.4 ± 1.0 | 1.2 ± 0.5 |
| 19–30 y | 10.5 ± 1.7 | 7.9 ± 1.5 | 3.2 ± 1.0 | 1.2 ± 0.5 |
| 31–50 y | 8.6 ± 1.1 | 6.3 ± 1.0 | 2.3 ± 0.6 | 0.8 ± 0.3 |
| 51–70 y | 9.8 ± 1.0 | 7.8 ± 0.9 | 3.4 ± 0.6 | 1.7 ± 0.4 |
| ≥71 y | 9.0 ± 1.2 | 7.6 ± 1.1 | 3.7 ± 0.8 | 2.3 ± 0.6 |
| Pregnant | ||||
| 14–50 y | 14.6 ± 2.6 | 11.9 ± 2.4 | 5.9 ± 1.8 | 3.7 ± 1.4 |
1
The “intake” population consisted of the 31,352 participants in NHANES 2003–2010 who provided dietary intake data on both survey days. The iodine concentration of DW was assumed to be 9.2 μg/L. DS, dietary supplements; DW, drinking water; NA, not available (the SE cannot be computed); SC, salt used in cooking; ST, salt used at the table.
2
Values are percentages ± SEs of individuals in each age group with iodine intakes below the Estimated Average Requirement for each iodine intake scenario shown.