Table 2.
Comparison between the studied groups according to the thyroid function tests
| Thyroid function tests | Participants exposed to radioiodine (Group I) (n = 40) |
Participants exposed to X-ray (Group II) (n = 40) |
Control group (Group III) (n = 40) |
p* | p** |
|---|---|---|---|---|---|
| TSH (μIU/ml) | |||||
| Min. – Max. | 0.85–4.61 | 0.31–3.12 | 0.92–3.24 | 0.896 | 0.010* |
| Mean ± SD. | 2.12 ± 0.90 | 1.80 ± 1.22 | 2.16 ± 0.73 | ||
| Free T3 (pg/ml) | |||||
| Min. – Max. | 2.35–3.56 | 2.44–4.25 | 2.09–3.43 | 0.047* | < 0.001* |
| Mean ± SD. | 3.01 ± 0.41 | 3.49 ± 0.53 | 2.76 ± 0.38 | ||
| Free T4 (ng/dl) | |||||
| Min. – Max. | 0.90–1.47 | 0.77–1.76 | 0.88–1.55 | 0.212 | 0.101 |
| Mean ± SD. | 1.28 ± 0.14 | 1.32 ± 0.20 | 1.25 ± 0.25 | ||
| Thyroglobulin (ng/ml) | |||||
| Min. – Max. | 0.69–43.30 | 0.86–37.60 | 4.12–49.30 | ||
| Mean ± SD. | 12.86 ± 11.53 | 10.81 ± 8.86 | 18.29 ± 11.29 | 0.028* | 0.005* |
| Anti-Thyroid Peroxidase Ab (IU/ml) | |||||
| Min. – Max. | 5.33–397.0 | 5.0–249.0 | 6.89–11.50 | ||
| Mean ± SD. | 35.61 ± 82.35 | 31.93 ± 57.58 | 8.40 ± 1.26 | < 0.001* | < 0.001* |
p*, p-value for comparing between group I and group III. p**, p-value for comparing between group II and group III. *: Statistically significant at p ≤ 0.05. Student t test was used