Thyroid hormonal variations: An overlooked factor in type 2 diabetes mellitus

Background: Type 2 diabetes mellitus (T2DM) and thyroid dysfunction are recognized as two of the most widespread endocrine conditions in clinical settings. Untreated thyroid dysfunction can detrimentally affect the metabolic management of individuals with diabetes. Despite the significant metabolic interplay between these disorders, thyroid dysfunction frequently goes undetected in diabetic populations. Specifically, subclinical hypothyroidism has been linked to compromised glycemic control and an elevated risk of cardiovascular events. Consequently, this study is designed to assess the prevalence and specific profile of thyroid hormone alterations among T2DM patients. It also aims to investigate the relationship of these alterations with key clinical factors, including glycemic control (glycated hemoglobin [HbA1c]), duration of diabetes, and patient demographics (gender and age). Methods: The current cross-sectional observational study was carried out at a tertiary care teaching hospital. In this study enrolled 200 participants. These individuals were systematically divided into two equally sized groups: A patient group comprising participants aged 30 to 70 years diagnosed with T2DM, and a control group consisting of healthy individuals precisely matched for both age and gender. An in-depth patient history was initially collected, succeeded by a clinical examination and a biochemical assessment. Comprehensive data encompassing demographic characteristics and biochemical markers were acquired and compiled. Results: The research uncovered varying patterns of thyroid dysfunction among T2DM subjects, with subclinical hypothyroidism identified as the leading manifestation (24%). The occurrence rate of thyroid dysfunction was markedly elevated in the T2DM cohort relative to the non-diabetic reference group (p < 0.001). A strong, statistically significant positive association (r = 0.76, p < 0.001) emerged between increased TSH concentrations and inadequate glycemic control (HbA1c > 8%). Thyroid dysfunction demonstrated a higher frequency specifically in postmenopausal women and in patients whose duration of diabetes exceeded 5 years. Conclusion: The result of study showed that the implementation of standardized, stratified thyroid screening protocols is recommended for all T2DM patients during their initial diagnostic evaluation. An annual follow-up is also advised, with particular emphasis on high-risk subsets. This proactive approach facilitates early identification of thyroid dysfunction, thereby mitigating associated diabetic complications and optimizing integrated endocrine management.