Table 5.
Urinary Iodine Median and 95% Confidence Interval by Race and Dairy Product, Salt, and Fish and Fish/Shellfish Consumption in Women of Childbearing Age, NHANES 2007–2008
| Race | Dairy consumption | n | Weighted % | UI (μg/L)median [CI] | p valuea |
|---|---|---|---|---|---|
| Non-Hispanic white | Never or rare | 149 | 27.1 | 111 [90–142] | 0.0001 |
| Not often | 167 | 31.1 | 131 [99–165] | ||
| Often | 216 | 41.8 | 189 [163–204] | ||
| Non-Hispanic black | Never or rare | 126 | 39.8 | 111 [82–132] | 0.0009 |
| Not often | 89 | 27.9 | 109 [89–163] | ||
| Often | 101 | 32.3 | 151 [110–212] | ||
| All Hispanic | Never or rare | 153 | 31.1 | 134 [106–155] | <0.0001 |
| Not often | 133 | 27.2 | 163 [130–196] | ||
| Often | 210 | 41.7 | 185 [155–207] |
| Salt consumption | |||||
|---|---|---|---|---|---|
| Non-Hispanic white | Never or rare | 142 | 27.1 | 110 [91–149] | 0.07 |
| Not often | 188 | 37.1 | 144 [116–189] | ||
| Often | 183 | 35.9 | 148 [113–185] | ||
| Non-Hispanic black | Never or rare | 77 | 24.5 | 117 [93–161] | 0.2 |
| Not often | 97 | 29.5 | 132 [82–195] | ||
| Often | 136 | 45.9 | 116 [97–132] | ||
| All Hispanic | Never or rare | 78 | 17.2 | 154 [124–239] | 0.2 |
| Not often | 128 | 27.1 | 152 [124–182] | ||
| Often | 255 | 55.6 | 165 [141–194] |
| Fish/shellfish consumption | |||||
|---|---|---|---|---|---|
| Non-Hispanic white | Yes | 353 | 70.6 | 144 [114–178] | 0.6 |
| No | 159 | 29.4 | 134 [100–175] | ||
| Non-Hispanic black | Yes | 244 | 81.7 | 119 [99–151] | 0.5 |
| No | 66 | 18.3 | 123 [83–159] | ||
| All Hispanic | Yes | 339 | 73.4 | 166 [153–185] | 0.03 |
| No | 128 | 26.6 | 146 [108–185] |
a
The p value tests whether the median UI concentrations were significantly different among never or rare, not often, and often dairy, and salt consumption groups within each race/ethnicity group. The p value tests whether the median UI concentrations were significantly different among yes or no answers for fish/shellfish consumption during the past 30 days within each race/ethnicity group.