Immune Checkpoint Inhibitor-induced Thyroid Dysfunction Is Associated with Higher Body Mass Index.
Abstract
Obesity is a proinflammatory metabolic state that may play a role in the development of immune-related adverse events (irAEs) associated with immune checkpoint inhibitor therapy. To characterize the association between body mass index (BMI) and thyroid irAEs. We performed a single-center, retrospective analysis of 185 cancer patients treated with anti-PD-1/L1 from January 2014 to December 2018. Patients with normal thyroid function at baseline and available BMI were included. The primary endpoint was difference in BMI in patients who developed overt thyroid dysfunction versus those who remained euthyroid following anti-PD-1/L1 initiation. Additional endpoints included any (overt or subclinical) thyroid dysfunction, overt thyrotoxicosis or overt hypothyroidism, and time to development of dysfunction according to BMI. Any thyroid dysfunction developed in 72 (38.9%) patients and 41 (22.1%) developed overt thyroid dysfunction. Mean BMI was higher in those with overt thyroid dysfunction versus euthyroid (27.3 ± 6.0 vs 24.9 ± 4.5, P = .03). Development of overt thyrotoxicosis versus remaining euthyroid was associated with higher BMI (28.9 ± 5.9 vs 24.9 ± 4.5; P < .01), whereas overt hypothyroidism was not (26.7 ± 5.5 vs 24.9 ± 4.5, P...Continue Reading
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