Table 3.
Thyroid hormones for farmers (n = 127) and non-farmers (n = 127).
| Thyroid Hormones | Farmers | Non-Farmers | Mean * Difference (95% CI of the Difference) | p-Value * |
|---|---|---|---|---|
| FT3 (µIU/mL) | ||||
| Geometric mean | 1.61 | 1.52 | 0.94 (0.92–0.96) | 0.000 |
| Min–max | 1.35–1.90 | 1.24–2.65 | ||
| FT4 (µIU/mL) | ||||
| Geometric mean | 2.52 | 2.56 | 1.01(0.10–1.03) | 0.118 |
| Min–max | 2.14–2.99 | 2.01–3.44 | ||
| T3 (µIU/mL) | ||||
| Geometric mean | 1.15 | 1.14 | 0.99 (0.97–1.02) | 0.528 |
| Min–max | 0.90–1.37 | 0.93–1.75 | ||
| T4 (µIU/mL) | ||||
| Geometric mean | 5.02 | 4.63 | 0.92 (0.87–0.97) | 0.003 |
| Min–max | 4.41–5.76 | 0.95–6.37 | ||
| TSH (µIU/mL) | ||||
| Geometric mean | 1.14 | 1.01 | 0.96 (0.91–1) | 0.104 |
| Min–max | 0.62–2.10 | 0.43–1.75 |
* Unpaired t test of the log (base 10) concentrations.