Relation of Different Components of Climate with Human Pituitary-Thyroid Axis and FT3/FT4 Ratio: A Study on Euthyroid and SCH Subjects in Two Different Seasons
Table 3
Comparison of the serum TSH, FT4, FT3, and FT3/FT4 ratio between summer and winter season.
Total
value
EU
value
SCH
value
TSH (mIU/l)
Summer
2.93 ± 1.96
0.136
2.34 ± 1.25
0.382
6.64 ± 1.60
0.171
Winter
2.77 ± 1.79
2.25 ± 1.25
6.04 ± 1.17
FT4 (ng/dl)
Summer
1.23 ± 0.57
0.007
1.23 ± 0.15
0.063
1.21 ± 0.15
0.009
Winter
1.20 ± 0.16
1.21 ± 0.16
1.14 ± 0.14
FT3 (pg/ml)
Summer
3.23 ± 0.44
<0.001
3.22 ± 0.44
<0.001
3.27 ± 0.45
0.853
Winter
3.37 ± 0.39
3.39 ± 0.40
3.25 ± 0.32
FT3/FT4 ratio
Summer
2.68 ± 0.45
<0.001
2.65 ± 0.45
<0.001
2.81 ± 0.44
0.037
Winter
2.87 ± 0.43
2.84 ± 0.43
2.99 ± 0.43
The parameters are expressed as the , and the means are compared using a Paired sample -test.
