Table 5.
Correlations of climate parameters of one day, one week, and one month before blood sample collection with the mean TSH, FT3, FT4, and FT3/FT4 ratio.
| Duration from sample taking | Euthyroid | ||||
|---|---|---|---|---|---|
| Climate parameters | FT3 (pg/ml) | FT4 (ng/dl) | FT3/FT4 ratio | TSH (mIU/l) | |
| One day | Temperature | -0.195 ∗ | 0.029 | -0.193 ∗ | 0.027 |
| Humidity | 0.204 ∗ | -0.032 | 0.222 ∗ | -0.046 | |
| Sunshine duration (hours) | -0.203 ∗ | 0.098 | -0.264 ∗∗ | 0.077 | |
| Cloud cover (octa) | 0.140 | -0.136 ∗ | 0.254 ∗∗ | -0.085 | |
| Atmospheric pressure | 0.174 ∗ | -0.02 | 0.151 | -0.001 | |
|
| |||||
| One week | Temperature | -0.220 ∗∗ | 0.058 | -0.239 | 0.007 |
| Humidity | 0.227 ∗∗ | -0.050 | 0.212 ∗∗ | -0.033 | |
| Sunshine duration (hours) | -0.141 | 0.033 | -0.142 | 0.07 | |
| Cloud cover (octa) | -0.041 | 0.001 | -0.042 | -0.021 | |
| Atmospheric pressure | 0.067 | -0.004 | 0.057 | -0.014 | |
|
| |||||
| One month | Temperature | -0.143 | 0.045 | -0.172 ∗ | 0.003 |
| Humidity | 0.124 | -0.02 | 0.136 | -0.037 | |
| Sunshine duration (hours) | -0.127 | 0.05 | -0.202 ∗ | 0.023 | |
| Cloud cover (octa) | 0.108 | -0.021 | 0.174 ∗ | -0.005 | |
| Atmospheric pressure | 0.168 ∗ | -0.035 | 0.186 ∗ | 0.001 | |
Correlations between parameters were found using Pearson's correlation. ∗P value < 0.05 and ∗∗P value < 0.01.