Abstract
Background and objective Systemic autoimmune disorders involve abnormal immune responses leading to tissue damage. Dysfunction of the thyroid gland due to autoimmune mechanisms is common in such disorders, which can cause either hypofunctioning or hyperfunctioning of the gland. This study aimed to investigate the prevalence of thyroid dysfunction among patients with various systemic autoimmune disorders. Material and methods This cross-sectional observational study included 110 adult patients either diagnosed with or having clinical/biological features of systemic autoimmune diseases. The patients underwent a detailed clinical history assessment, physical examination, and necessary investigations. Data were analyzed using IBM SPSS Statistics for Windows, Version 26.0. (IBM Corp., Armonk, NY). Results Among the 110 autoimmune disorder patients, 22.7% had thyroid dysfunction, specifically hypothyroidism, while 77.3% were euthyroid. Hypothyroidism was prevalent among patients with rheumatoid arthritis (RA, 20.3%), systemic sclerosis (SSc, 20%), ankylosing spondylitis (AS, 15.8%), and systemic lupus erythematosus (SLE, 54.5%). Moreover, 60% of patients were anemic, and the prevalence of anemia was higher among female patients and younger individuals. Conclusions This study showed a higher prevalence of thyroid dysfunction, particularly hypothyroidism, in patients with systemic autoimmune disorders. Female patients and younger individuals were more susceptible to autoimmune disorders, thyroid dysfunction, and anemia. These findings highlight the need for simultaneous screening and evaluation for thyroid dysfunction and anemia in systemic autoimmune disease patients, particularly in female patients and those of younger age groups.