Background: Hypothyroidism is a common endocrinal disorder caused by insufcient production of
thyroid hormones. Subclinical hypothyroidism (SCH) can be dened as a state of high serum thyroid
stimulating hormone (TSH) levels (less than 10µIU/ml) with normal serum free thyroxine (fT ) and triiodothyronine (fT ) levels in 4 3
the presence or absence of symptoms. Creatinine is a chemical waste product that is produced by muscle metabolism.
Creatinine is produced from creatine, a molecule of major importance for energy production in muscles. Thyroid dysfunction
can affect renal physiology and development, and on the other hand, kidney disorders can inuence thyroid function. This
study was aimed to nd out the status of serum fT , fT ,TSH and serum creatinine levels in subclinical hypothyroid cases and 3 4
healthy controls. Materials and Methods: The present study is descriptive case control study, was conducted in the Department
of Biochemistry, J.L.N. Medical College and Associated group of Hospitals, Ajmer (Raj.). 130 cases of subclinical
hypothyroidism attending Medical OPD of J.L.N. Hospitals were included and 50 age-sex matched euthyroid controls were
selected. Results: The mean serum creatinine levels were found to be signicantly high in subclinical hypothyroid cases(0.99
+ 0.19 mg%) as compared to healthy controls (0.75 + 0.15 mg%), (p<0.0001). Conclusion: Serum creatinine can be used as a
biomarker for early detection of subclinical hypothyroidism in general population to prevent the morbidity and mortality which
are associated with hypothyroidism. Early diagnosis and intervention of subclinical hypothyroid and their cluster of risk factor
can prevent the renal dysfunction.