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Iodine intake estimated from food diaries plus supplements (μg/day)
| Median | 25th-75th percentile | Correlation with 24-h iodine excretion (μg/24-h) | |
|---|---|---|---|
| 24-h before urine collection | 148† | 82, 228 | r=0.70, p<0.0001 |
| 24-h of urine collection | 116 | 74, 213 | r=0.66, p<0.0001 |
| Average of the two 24-h records | 123 | 87, 211 | r=0.75, p<0.0001 |
No significant difference in iodine intake between the 24 h before urine collection and the 24 h of urine collection; paired t-test: p=0.23
