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
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.