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| Parameters | Reference Values | 18-30 years | 31-40 years | 41-45 years | χ2 | p |
|---|---|---|---|---|---|---|
| % | % | % | ||||
| TSH | No | 15.4 | 22.4 | 14.3 | 1.094 | 0.579 |
| Yes | 84.6 | 77.6 | 85.7 | |||
| FT3 | No | 17.5 | 30.6 | 17.9 | 2.698 | 0.260 |
| Yes | 82.5 | 69.4 | 82.1 | |||
| FT4 | No | 2.5 | 20.4 | 14.3 | 6.390 | 0.041 |
| Yes | 97.5 | 79.6 | 85.7 |
