Table 3.
Regression analyses demonstrating the relationships between urinary perchlorate concentration and other potential confounding variables on serum FT4 and TSH in a subgroup of women with UIC < 100 μg/l (n = 174)
| β | SE | 95% CI for β | t | p | |
|---|---|---|---|---|---|
| Factors associated with serum FT4 | |||||
| Urinary perchloratea | −0.33 | 0.166 | (−0.655, 0.001) | −1.97 | 0.05 |
| Urinary iodinea | 0.153 | 0.308 | (−0.455, 0.762) | 0.50 | 0.6 |
| Urinary thiocyanatea | 0.184 | 0.170 | (−0.151, 0.520) | 1.09 | 0.3 |
| TPO-Ab positive | −0.316 | 0.512 | (−1.328, 0.70) | −0.616 | 0.54 |
| Factors associated with serum TSHa | |||||
| Urinary perchloratea | 0.04 | 0.043 | (−0.046, 0.125) | 0.91 | 0.4 |
| Urinary iodinea | −0.06 | 0.081 | (−0.214, 0.104) | −0.68 | 0.5 |
| Urinary thiocyanatea | −0.044 | 0.044 | (−0.131, 0.044) | −0.98 | 0.3 |
| TPO-Ab positive | 0.257 | 0.134 | (−0.01, 0.52) | 1.92 | 0.06 |
aDenotes variable transformed using natural logs (allowing â coefficients to be interpreted in terms of percentage change)
Bold value is significant result in the table