Table 3.
Correlations of serums TSH, T3, and fT4 with oxidative stress biomarkers in the whole population before and after controlling for total cholesterol (TC) levels.
| Biomarkers | TSH | T3 | fT4 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Before | After | Before | After | Before | After | |||||||
| r | P | r | P | r | P | r | P | r | P | r | P | |
| TBARS, nmol MDA/mL | 0.734 | 0.000 | 0.149 | 0.497 | −0.137 | 0.522 | 0.034 | 0.875 | −0.008 | 0.969 | 0.217 | 0.319 |
| CAT, U/g Hb | 0.499 | 0.004 | 0.036 | 0.870 | −0.278 | 0.124 | −0.153 | 0.485 | −0.269 | 0.137 | −0.121 | 0.580 |
| SOD, U/mg Hb | 0.330 | 0.065 | 0.061 | 0.781 | −0.106 | 0.566 | 0.084 | 0.702 | 0.014 | 0.938 | 0.169 | 0.440 |
P < 0.05 was considered statistically significant. TSH: thyroid-stimulating hormone; T3: triiodothyronine; fT4: free thyroxine; TBARS: thiobarbituric acid reactive substances; CAT: catalase; SOD: superoxide dismutase.