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Table 2 Comparison between the studied groups according to the thyroid function tests

From: Assessment of thyroid gland hormones and ultrasonographic abnormalities in medical staff occupationally exposed to ionizing radiation

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*

  1. 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