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Objective: Investigation of the thyroid function test (fT3, fT4 and TSH) results and the prevalence of overt/subclinical hypothyroidism according to age groups in patients who had applied to our hospital and diagnosed with pregnancy.
Material and Methods: Two thousand nine hundred and thirty-six women diagnosed with pregnancy for the first time upon seeing the fetal heartbeats with ultrasonography between January 2015 and December 2018, were included in our study. Patients were divided into 5 age groups, namely, the age groups of ≤18 years of age, 19-25 years, 26-35 years, 36-45 years and >45 years of age. The fT3, fT4 and TSH levels were statistically compared between all the patients and age groups.
Results: Two thousand nine hundred and thirty-six pregnant women were included in the study. The mean fT3 value was found as 3.180±0.519 (pg/mL), fT4 value as 1.051±0.258 (ng/d/L) and TSH value was found as 2.000±1.595 (mIU/mL) in all the population. The mean fT3, fT4 and TSH values were not statically different among the age groups (p=0.06, p=0.08 and p=0.829, respectively). No statistically significant differences were found among all the age groups as regards hyperthyroidism, euthyroidism, subclinical hypothyroidism and overt hypothyroidism (p=0.200).
Conclusion: Consistently with the previous studies in our country, the prevalence of subclinical hypothyroidism was found as high as 22.7% in our study. We think that scanning for hypothyroidism must be performed in the pregnancy period without discriminating between risk groups in our country, which is located in the iodine deficiency region. However, considering the different age groups, we believe that TSH levels must be measured with the same apprehensiveness for each age group since no statistically significant differences are found between age groups.
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