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

Table 5 Correlation between working period and annual absorbed dose with different studied biomarkers in radiation workers

Participants exposed to radioiodine (Group I) (n = 40)	Working period (years)		Annual effective dose (mSv)		Participants exposed to X-ray (Group II) (n = 40)	Working period (years)		Annual effective dose (mSv)
Participants exposed to radioiodine (Group I) (n = 40)	r_s	p	r_s	p	Participants exposed to X-ray (Group II) (n = 40)	r_s	p	r_s	p
TSH	0.249	0.263	0.112	0.618	TSH	−0.075	0.693	0.085	0.657
Free T3	0.002	0.992	−0.123	0.584	Free T3	0.108	0.569	0.267	0.154
Free T4	0.257	0.248	−0.085	0.708	Free T4	0.226	0.230	0.176	0.352
Thyroglobulin	0.166	0.461	0.130	0.564	Thyroglobulin	0.293	0.611	−0.145	0.445
Thyroid-Anti-peroxidase Ab	0.047	0.837	0.310	0.098	Thyroid-Anti-peroxidase Ab	0.137	0.469	0.238	0.205
MDA	0.520	0.013^*	0.320	0.147	MDA	0.121	0.526	0.344	0.062
H₂O₂	0.008	0.972	−0.084	0.711	H₂O₂	0.141	0.457	0.258	0.169
TAC	0.170	0.449	0.173	0.441	TAC	−0.005	0.980	−0.137	0.470

ISSN: 1472-6823