Table 2.
Concentrations [medians (range)] of urinary iodine, perchlorate, and thiocyanate and serum thyroid function of entire data set
| Vegetarians (n = 78) | Vegans (n = 62) | P | |
|---|---|---|---|
| Urinary iodine (μg/liter)a | 147.0 (9.3–778.6) | 78.5 (6.8–964.7) | <0.01 |
| Urinary perchlorate (μg/liter)a | 4.6 (0.2–42) | 3.6 (0.2–258) | 0.75 |
| Urinary thiocyanate (μg/liter)a | 341 (31–1963) | 630 (108–3085) | <0.01 |
| Urinary cotinine (ng/ml)a | 0.22 (0–2849) | 0.10 (0–83947) | 0.34 |
| TSH (mIU/liter)b | 1.38 (0–3.52) | 1.10 (0.14–6.81) | 0.46 |
| FT4 (ng/dl)b | 1.29 (0.95–1.66) | 1.24 (0.92–1.67) | 0.77 |
a
n = 77 (vegetarians) and n = 62 (vegans) due to missing data.
b
n = 76 (vegetarians) and n = 60 (vegans) due to missing data.