Dr. Ettleson’s research interests include epidemiology and health services research in the diagnosis and treatment of thyroid disease. Specifically, his research is aimed at evaluating and improving the quality of care delivered to patients with hypothyroidism. He has investigated patterns in hypothyroidism treatment, medical decision making, and clinical outcomes. The ultimate goal of his research program is to optimize hypothyroidism treatment to improve the patient experience and reduce adverse outcomes. He is currently developing novel approaches to measure and improve the quality of levothyroxine treatment in hypothyroidism as part of a career development grant funded by the NIDDK. In the DCAM endocrinology clinic, Dr. Ettleson sees patients with general endocrinology conditions in the DCAM, with a focus on thyroid diseases, type 2 diabetes, and male hypogonadism.
Adverse Outcomes in Patients With Hypothyroidism Undergoing Bariatric Surgery: A Retrospective Study Using TriNetX.
Adverse Outcomes in Patients With Hypothyroidism Undergoing Bariatric Surgery: A Retrospective Study Using TriNetX. J Clin Endocrinol Metab. 2026 Feb 20; 111(3):e766-e777.
PMID: 40971953
Measuring Hypothyroidism Disease Control Using a TSH-based "Time-in-range".
Measuring Hypothyroidism Disease Control Using a TSH-based "Time-in-range". J Clin Endocrinol Metab. 2026 Jan 21; 111(2):e484-e492.
PMID: 40645612
Treatment of Hypothyroidism That Contains Liothyronine is Associated With Reduced Risk of Dementia and Mortality.
Treatment of Hypothyroidism That Contains Liothyronine is Associated With Reduced Risk of Dementia and Mortality. J Clin Endocrinol Metab. 2026 Jan 21; 111(2):561-571.
PMID: 40579157
Lower Serum Triiodothyronine Levels Constitute an Independent Risk Factor for Dyslipidemia in Levothyroxin-Treated Patients.
Lower Serum Triiodothyronine Levels Constitute an Independent Risk Factor for Dyslipidemia in Levothyroxin-Treated Patients. Endocr Pract. 2026 Feb; 32(2):135-141.
PMID: 40774617
Treatment Preferences in Patients With Hypothyroidism.
Treatment Preferences in Patients With Hypothyroidism. J Clin Endocrinol Metab. 2025 Feb 18; 110(3):887-900.
PMID: 39290156
The Impact of Hypothyroidism on Cardiovascular-Related Healthcare Utilization in the US Population With Diabetes.
The Impact of Hypothyroidism on Cardiovascular-Related Healthcare Utilization in the US Population With Diabetes. J Endocr Soc. 2024 Nov 26; 9(1):bvae204.
PMID: 39669655
TSH Trajectories During Levothyroxine Treatment in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) Cohort.
TSH Trajectories During Levothyroxine Treatment in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) Cohort. J Clin Endocrinol Metab. 2024 Nov 18; 109(12):3065-3075.
PMID: 38780968
The Association Between Hypothyroidism and Cognitive Function Change in Women across the Menopause Transition: The Study of Women's Health Across the Nation.
The Association Between Hypothyroidism and Cognitive Function Change in Women across the Menopause Transition: The Study of Women's Health Across the Nation. Thyroid. 2024 10; 34(10):1205-1213.
PMID: 39225158
Thyroid Hormone Homeostasis in Levothyroxine-treated Patients: Findings From ELSA-Brasil.
Thyroid Hormone Homeostasis in Levothyroxine-treated Patients: Findings From ELSA-Brasil. J Clin Endocrinol Metab. 2024 Sep 16; 109(10):2504-2512.
PMID: 38506164
A Cross-Sectional Analysis of Cardiovascular and Bone Health Care Utilization During Treatment With Thyroid Hormone.
A Cross-Sectional Analysis of Cardiovascular and Bone Health Care Utilization During Treatment With Thyroid Hormone. J Clin Endocrinol Metab. 2024 Feb 20; 109(3):e1143-e1150.
PMID: 37878964