Table 1. Characteristic and thyroid outcomes of study groups.
| Group 1 (n = 300) | Group 2 (n = 300) | p value | Adjusted p value | |
|---|---|---|---|---|
| Age (at the examination) | 28.3 ± 1.4 | 23.0 ± 1.4 | <0.001 | – |
| Female, n (%) | 237 (79) | 237 (79) | – | – |
| Free T3, pg/ml | 2.66 ± 1.18 | 2.75 ± 0.99 | 0.333 | 0.016* |
| Free T4, ng/dl | 1.33 ± 0.39 | 1.39 ± 0.30 | 0.014* | 0.074 |
| TSH, μIU/ml | 1.08 (0.76–1.75) | 1.22 (0.81–1.77) | 0.183 | – |
| Log(TSH) | 0.02 ± 0.44 | 0.04 ± 0.40 | 0.308 | 0.602 |
| Overt hypothyroidism, n | 3 | 1 | 0.320 | – |
| Subclinical hypothyroidism, n | 7 | 2 | 0.093 | – |
| Thyroid volume, ml | 15.93 ± 7.00 | 15.74 ± 5.29 | 0.718 | 0.204 |
| 137Cs body burden, Bq/kg | 0 (0–49.65) | 0 (0–159.34) | 0.261 | – |
Notes:
Age, FreeT3, FreeT4, log TSH and thyroid volume are shown as mean ± SD. TSH is shown as median(IQR) and 137Cs body burden is shown as median (minimum-maximum). FreeT3, FreeT4 concentrations and log-TSH were adjusted for age and thyroid volume was adjusted for body weight between the groups were compared by analysis of covariance.
*
p < 0.05.