Citations

Abstract Disclosure: S.R. Chacko: None. C.A. Villavicencio Torres: None. K. Yu: None. S.G. Waguespack: None. L. Lu: None. Z. Belaya: None. T. Bandgar: None. A. Sada: None. O. Ragnarsson: None. B. Altieri: None. A. Newman: None. P. Vibhatavata: None. M. Tóth: None. E.V. Varlamov: None. C. Badiu: None. A. Paissan: None. M. St-Jean: None. H. Falhammar: None. N. Imamudeen: None. L. Haberbosch: None. M. Bobrowicz: None. A. Tabarin: None. R. Shah: None. M.R. Gadelha: None. A. Peersen: None. W.F. Young: None. J. Kaplan: None. J. Varghese: None. M.A. Habra: None. O. Golounina: None. G.A. Melnichenko: None. A.R. Lila: None. C. Yamichannaiah: None. I. Bancos: None. Context: Cushing syndrome (CS) due to ectopic ACTH secretion (EAS) is a rare condition, associated with severe hypercortisolism and consequent morbidity and mortality. Its varied and often emergent presentation make diagnosis and treatment challenging. Objectives: 1.Characterize clinical and biochemical presentation of EAS. 2.Describe the scope of hypercortisolism-related complications, overall and CS-specific mortality. 3.Identify factors associated with CS-specific mortality. Methods: We conducted a multicenter retrospective cohort study in patients with EAS at 37 centers. Outcomes were clinical/biochemical severity scores, complications, overall and CS-specific mortality. Results: In 1053 patients [median age at diagnosis 52 years (IQR 37-64), 57% women], metastatic disease was present at diagnosis in 585 (56%). The most common sources of EAS were bronchial neuroendocrine neoplasm (NEN) (304, 29%), pancreatic NEN (114, 11%) and small cell lung carcinoma (114, 11%), with the source of EAS being occult in 192 (18%). Clinical and biochemical severity scores were severe in 475 (45%) and 873 patients (92%) respectively. Hypokalemia was present in 819 patients (78%) in the year prior to diagnosis. Of 342 patients (32%) who had IPSS, 301 (88%) suggested an ectopic source, 7 (2%) a pituitary source, and 23 (7%) were non-diagnostic. Of 595 patients who had both functional and cross-sectional imaging, discordant findings were seen in 122 (21%), concordant lesion was seen on both in 326 (55%), and no lesion in 147 (25%). Of those with discordant results, cross-sectional imaging was accurate in 66 (54%) and functional imaging in 56 (46%).Management included medical therapy alone in 237 (23%), surgical excision of the source of EAS in 158 (15%), bilateral adrenalectomy in 77 (7%) and multimodal therapies in 498 patients (47%). Complications within 5 years after diagnosis included hospitalization related to CS or its therapy in 351 (33%), infection in 337 (32%), thromboembolic event in 102 (10%), cardiovascular event in 83 (8%) and cerebrovascular event in 27 (3%). During a median follow-up of 35 months (IQR 20-122) from CS diagnosis, death occurred in 462 patients (44%), with the cause of death related to CS in 149 (14%). CS-specific mortality was higher in metastatic compared with non-metastatic disease (19% vs. 7%, P<0.001). On multivariable analysis of age, sex, clinical and biochemical severity, older age (HR 1.03, 95% CI: 1.02-1.04) and lower clinical severity score (HR 0.97, 95% CI: 0.94-0.99), were associated with higher CS-specific mortality. Conclusion: Our interim analysis, the largest worldwide, found that most patients with EAS had severe hypercortisolism and hypokalemia. Metastatic disease was present in 56%, and the source of EAS was occult in 18%. CS-related death occurred in 14%, emphasizing the need for urgent management. Presentation: Monday, July 14, 2025

Abstract Disclosure: M. Kakakhel: None. S. Cheema: None. R. Haider: None. M.H. Alsaadi: None. M. Ikram: None. W. Ftih: None. H. Jawad: None. M.U. Rehman: None. R. Akhtar: None. A. Qadeer: None. M. Khawar: None. A. Ullah: None. H. Ahmad: None. F. Ahmed: None. R. Alcaraz: None. Introduction: Conditions that disrupt the adrenal glands' typical function are known as adrenal gland ailments or diseases. This study examines the distribution of adrenal disorders across various demographic and geographic groups in the United States, including gender, census region, race, age groups, and urbanization levels. Our objective was to identify disparities and trends to inform targeted interventions and resource allocation. Methods: From 1999 to 2020, mortality statistics for adrenal diseases were extracted from the CDC-WONDER database. Age, sex, race, location, urbanization status, and place of death were used to stratify the age-adjusted mortality rates (AAMRs) and crude mortality rates (CMRs) per 100,000. We calculated the average annual percentage change (APC) using Joinpoint regression software. Results: A total of 31,028 fatalities were reported due to adrenal disorders from 1999-2020 (AAPC: 1.277; 95% CI, -0.032 to 2.6032, p=0.055916). An initial rising trend was observed from 1999-2003 (APC: 2.4799), followed by a declining trend from 2003-2013 (APC: -3.0094), then a modest rise from 2013-2018 (APC: -0.9188), and finally a sharp increase from 2018-2020 (APC: 2.9445). Males had a higher AAMR (6.8) than females (6.4). The West census region had the highest AAMR (7.2), followed by the Midwest (7.1), South (6.3), and Northeast (5.6). The highest crude mortality rate was observed in individuals aged 85+ years (52.2). Several disparities were noted when stratified by urbanization and race, including the highest AAMR in Non Core (Nonmetro) regions (7.9) and among American Indian or Alaska Native populations (8.2). The highest percentage of deaths occurred in medical facilities. Conclusions: The findings underscore the need for tailored public health strategies to address disparities in adrenal disorders among vulnerable populations. Specific attention should be directed towards the male gender, West census region, American Indian or Alaska Native populations, and the geriatric population. Future research should explore underlying causes and interventions to mitigate these disparities. Presentation: Monday, July 14, 2025

Abstract Disclosure: Y. Ahmed: None. S.M. Saad-Omer: None. R.M. Castro: None. M. Rivera: None. M.N. Stan: None. Background: Fine-needle aspiration (FNA) is a cornerstone in the evaluation of thyroid nodules. Its accuracy during long term follow up is not well established though. Our project aims to address that. Objective: To assess long-term accuracy of FNA results at Mayo Clinic Rochester including diagnostic classifications, procedural and cytologic variables, and concordance with surgical pathology. Methods: We conducted a retrospective cohort study of patients who underwent thyroid FNA at Mayo Clinic Rochester in 2014, to allow for the long-term follow-up. Descriptive statistics summarized patient demographics, nodule characteristics, and procedural factors. Cross-tabulation was used to evaluate concordance between FNA cytology and surgical pathology. This is an interim analysis. Results: Among 199 patients (from 741 FNAs that year), the mean age was 58.6 ± 14.1 years, and 73.7% were female. The average BMI was 29.6 ± 6.4 kg/m². Most had non-toxic multinodular goiter (69.3%) or non-toxic solitary nodules (27.6%). Nodules were 45% solid, 8% cystic, and 47% mixed, with a mean size of 2.3 cm. FNA results were predominantly benign (Bethesda II, 80%), followed by malignant (Bethesda VI, 8%), suspicious for follicular neoplasm (Bethesda IV, 7.5% ), non-diagnostic (Bethesda I, 3%), and suspicious for malignancy (Bethesda V,1%). There were no cases read as Bethesda III (AUS) in 2014. Of the 16 Bethesda VI cases, 15 had surgery; 14 were confirmed malignant, and 1 was benign (Hurthle cell adenoma). Both Bethesda V cases that underwent surgery were benign. Of the 15 Bethesda IV cases, 12 had surgery; 11 were benign and 1 was malignant and 3 had long term follow up (2 benign, and one malignant based on the available data). Overall the malignancy rate for Bethesda IV was 13.3%. Surgery was performed in 12 Bethesda II cases, with final pathology available for 11; 9 were confirmed benign, while 2 were malignant. In the other 147 cases of benign FNAs that didn’t undergo surgery we have not identified any indication of necessity for surgery during the mean of 9 years of follow-up, presumably indicating their benign character. Overall malignancy rate for this group was 1.3%. We had only 6 non diagnostic FNAs (Bethesda I), with all of them during follow up proven benign (2 by surgery, 2 by repeat FNA and 2 by long term follow up). Conclusion: Long term follow up data (over 9 years) support the continued reliability of Bethesda II and VI , while conversely raising questions about the significance of the Bethesda V classification. The malignancy rate in Bethesda IV (likely including the Bethesda III category at the time) is consistent with our institutional data, although it remains lower than that reported by other institutions. We’re currently enriching our cohort to verify and strengthen our conclusions. Presentation: Monday, July 14, 2025

Abstract Disclosure: M. Kakakhel: None. R. Haider: None. S. Cheema: None. S.M. Irshad: None. M.U. Hussain: None. A. Ullah: None. A.Z. Khan: None. F. Naveed: None. H. Jawad: None. F. Naveed: None. M.F. Hemida: None. A. Qadeer: None. M. Khawar: None. H. Ahmad: None. F. Ahmed: None. R.W. Kirchoff: None. R. Alcaraz: None. Background: Hypertension has been a significant cause of morbidity and mortality for ages. Coupled with endocrine disorders, it poses a greater risk of indisposition to the U.S population. This CDC wonder analysis explores the trends and patterns of these disorders, stratified by states and rural/urban. Methods: To attain this objective, this retrospective study has utilized data from the Center for Disease Control and Prevention's Wide-Ranging Online Data for Epidemiologic Research (CDC WONDER) database to assess endocrine disorder-related mortality rates in the pediatric population from 1999 to 2011. Average Annual Percentage Change (AAPC) and Annual Percent Change (APC) were used to evaluate trends and produce age-adjusted mortality rates (AAMRs) per 100,000 people. Data was stratified by year, sex, race/ethnicity, state-wise and geographical regions. Statistical significance and confidence intervals were used to assess the reliability of the observed trends. Results: Between 1999 and 2020, 2383332 deaths in the United States were attributed to endocrine-related mortality with underlying hypertension. The Overall AAMR initially rose steeply from 10.7 in 1999 to 24.9 in 2001 (APC: 34.3; 95% CI: 9.5 to 56.7), followed by a period of further steady increase in AAMR till 36.5 in 2018 (APC: 1.6; 95% CI: 0.6 to 2.1). This progressive increase in AAMR then sharply spiked from 2018 onwards, reaching 51.7 in 2020 (APC: 18.1*; 95% CI: 9.3 to 23.5). Notable discrepancies were observed in urbanization. Non-metropolitan areas showed a higher AAMR (35.5) than metropolitan (31.5). State-level analysis revealed substantial heterogeneity, including Mississippi as the state of the highest AAMR (58.6). Conclusion: The concerning rise of AAMR in non-metropolitan areas and Mississippi calls for more targeted health-care policies. These findings underscore the need for geographically tailored public health interventions to address disparities in endocrine disorder-related mortality in these groups. Presentation: Monday, July 14, 2025

Abstract Disclosure: M. Kakakhel: None. S. Cheema: None. R. Haider: None. M. Filal: None. A. Ullah: None. M.U. Hussain: None. M.A. Sadiq: None. T. Asghar: None. F. Arshad: None. N.K. Binashikhbubkr: None. H. Jawad: None. A. Abdullah: None. M. Qadri: None. A. Qadeer: None. M. Khawar: None. H. Ahmad: None. F. Ahmed: None. R. Alcaraz: None. Background: Hypertension is a major global health issue, affecting nearly half of U.S. adults. It is a leading risk factor for cardiovascular diseases like stroke, heart attack, and heart failure. Additionally, it is often linked to endocrine disorders, which can result in secondary hypertension. Endocrine disorders contributed to a concerning 2,383,332 deaths in the United States between 1999 and 2020, with many of these individuals having underlying hypertension. Methods: Death certificate data for adults aged 25 and older were obtained from the CDC-WONDER database. Crude mortality rates (CMR) and age-adjusted mortality rates (AAMRs) per 100,000 individuals were computed. Temporal trends were analyzed by calculating the annual percent change (APC) and the average annual percent change (AAPC) in the rates using Joinpoint regression analysis. Results: The age-adjusted mortality rate (AAMR) rose sharply from 10.7 (95% CI:10.6-10.9) in 1999 to 24.9 (95% CI: 9.5 to 56.7) in 2001, then continued to increase steadily to 36.5 (95% CI: 0.6 to 2.1) by 2018. From 2018 onwards, the rate spiked significantly, reaching 51.7 (95% CI: 9.3 to 23.5) in 2020, which coincided with the COVID-19 pandemic. Men had higher overall AAMR i.e. 36.6 as compared to women 28.4 during the span of this study. Stratifying by race, Non-Hispanic Blacks or African Americans had the highest overall age-adjusted mortality rate at 64.4 vs non-Hispanic whites, who had the lowest rate at 27.6. Southern states exhibited the highest mortality rates among the census region followed by the Western, Midwestern, and Northeastern regions. In contrast, the Annual Mortality Rates (AAMRs) displayed similar patterns across all regions. Regarding age, people aged 85 and above had the highest mortality rate among all the age groups while ages 25-34 had the lowest. Conclusion: Endocrine disorders associated with underlying hypertension showed an increasing trend throughout the study period, peaking during the COVID-19 pandemic. These findings account for immediate targeted interventions directed at the most vulnerable demographic and geographical groups Presentation: Monday, July 14, 2025

Abstract Disclosure: M. Salama: None. F. Pinto e Vairo: None. D. Hassan: None. S. Pittock: None. A. Lteif: None. O. Olson: None. A. Al Nofal: None. K. Leopold: None. S. Kumar: None. Objective: This study aimed to evaluate the effects of semaglutide on body mass index (BMI) and cardiometabolic profiles in adolescents with genetic variants associated with a likely high risk of monogenic obesity. Methods: A retrospective chart review was conducted for adolescents with severe obesity who underwent multigene panel testing for monogenic obesity and were treated with semaglutide. Results: Data from 27 adolescents were analyzed. At baseline, the median BMI percent of the 95th percentile (IQR) was 148 (135-189), with a mean age (SD) of 15.5 years (1.93) at treatment initiation and a median (IQR) treatment duration of 8 months (6-12). The median semaglutide dose (IQR) was 1.7 mg weekly (1.0- 2.4). Seven participants comprised the ‘’likely monogenic risk’’ group, characterized by predicted deleterious variants in dominant genes and/or carrying known dominant risk alleles. Twenty patients formed the “indetermined/negative “group, defined as harboring single rare variants in recessive genes or negative panel testing. In the likely monogenic risk group, weight loss was 8.5% with a median decrease in BMI % of the 95th %ile of 17 (95% CI 1.5- 22, p = 0.02). In the indetermined/negative group, weight loss was 7.6% with a median decrease in BMI % of the 95th %ile of 14 (95% CI 11.5- 27.5, p = <0.001). There was no statistically significant difference in median BMI % of the 95th % ile reduction between the two groups (p = 0.8) or BMI percent change (p = 0.89). Cardiometabolic changes in the likely monogenic risk group included reductions in HbA1c by 0.3% (95% CI: 0.15- 0.4, p = 0.03), total cholesterol by 15 mg/dL (95% CI: 7- 48, p = 0.03), and non-HDL cholesterol by 16.5 mg/dL (95% CI: 12- 40, p = 0.03). No significant changes were observed in fasting blood glucose, triglycerides, LDL cholesterol, HDL cholesterol, or ALT levels. The indetermined/negative group exhibited a significant reduction in HbA1c by 0.25% (95% CI 0.1 - 0.7| p = 0.009). Conclusion: Semaglutide treatment was associated with significant reductions in BMI and improvements in several cardiometabolic parameters in adolescents with likely high-risk monogenic obesity variants. These findings suggest semaglutide as a potentially effective therapeutic option for managing severe obesity in this population. Larger prospective studies are warranted to confirm and further assess these outcomes. Presentation: Monday, July 14, 2025

Abstract Disclosure: D. Hassan: None. M. Salama: None. K. Muthusamy: None. A.M. Haqq: None. S. Kumar: None. Introduction: Bardet-Biedl syndrome (BBS) is a rare genetic condition characterized by obesity and considerable clinical and genetic heterogeneity. While cardiometabolic and endocrine comorbidities are commonly associated with BBS, data on their prevalence, particularly in children, remain limited. Objective: To assess the prevalence of cardiometabolic and endocrine comorbidities among pediatric and adult patients with BBS. Methods: This is a retrospective chart review of pediatric and adult patients with BBS evaluated in the outpatient setting at Mayo clinic. The cohort included individuals aged 0-50 years with either a clinical or genetic diagnosis of BBS, identified from January 1, 2000, onward. Demographic, anthropometric, phenotypic, and biochemical data were reviewed. Results: The study comprised 34 patients, including 9 children (median age 8 years (IQR: 3.5-11)) and 25 adults (median age 33.5 years (IQR: 27-42)). Females constituted 56% of the cohort and White individuals accounted for 76%. The median age at diagnosis of BBS was 9 years (IQR: 3-16). Phenotypic characteristics included retinal dystrophy in 33% of children and 92% of adults, polydactyly in 78% of children and 52% of adults, and learning disabilities in 56% of children and 52% of adults. Obesity was prevalent in 56% of children and 80% of adults. Among children, their median maximum BMI % of the 95th percentile was 149% (IQR: 136-163%). Adults had a a median maximum BMI of 50 kg/m² (IQR: 43-55). There was insufficient data to determine the onset of hyperphagia; however, the median age of obesity onset for the cohort was 7 years (IQR: 4-11). No cases of diabetes or prediabetes were identified among children, whereas 40% of adults were diagnosed with type 2 diabetes. Cardiometabolic characteristics included hypertension in 11% of children and 48% of adults, kidney dysfunction in 33% of children and 56% of adults. Dyslipidemia was noted in 22% of children and 44% of adults, with median triglyceride levels 133 mg/dL (IQR: 93-153) in children and 142 mg/dL (IQR: 120-200) in adults. No cases of cardiovascular disease were identified in children, whereas 8% of adults were diagnosed with the condition. Endocrine characteristics included hypothyroidism in 11% of children and in 24% of adults. Of the 34 patients, genotype data were available for 28 individuals (82%). The most prevalent genotype was BBS1, comprising 27% of the cases. This was followed by BBS2 and BBS10, which each accounted for 15% of the cohort. Genotypes BBS4, BBS6 (MKKS2), IFT172, and SCLT1 were each observed in 3% of the cohort. Conclusion: This study highlights the significant clinical, cardiometabolic, and endocrine burden associated with BBS across children and adults. These findings underscore the importance of early and comprehensive multidisciplinary management of BBS. Keywords: Bardet-Biedl syndrome, obesity, cardiometabolic, endocrine comorbidities. Presentation: Monday, July 14, 2025

Abstract Disclosure: R. Haider: None. M. Waqas: None. S. Khan: None. A. Ullah: None. M. Khawar: None. A. Qadeer: None. M. Talha: None. A. Batool: None. A. Khan: None. M.Z. Haider: None. R.W. Kirchoff: None. Background: Hypothyroidism and heart failure (HF) contribute significantly to mortality among older adults. Understanding mortality trends, including demographic, geographic, and socio-economic disparities, is crucial to inform healthcare policies and resource allocation. Methods: This study analyzed age adjusted mortality rates (AAMRs) from 1999 to 2022 for adults aged 55-85+ years. Age adjusted mortality rates (AMRs) per 1,000,000 population were stratified by gender, race, geographic location, and urbanicity. Trends were evaluated using Average Annual Percentage Change (APC) with 95% confidence intervals (CI), examining periods of decline and increase. Results: Between 1999 and 2022, 105,008 deaths were recorded among older adults (55-85+ years) due to hypothyroidism and heart failure (HF). The age-adjusted mortality rate (AAMR) initially declined from 1999 to 2016, marked by a significant drop between 2005 and 2008 (APC = -6.0, 95% CI: -7.6 to -3.0). However, mortality trends reversed post-2016, with a sharp increase (APC = 6.7, 95% CI: 5.5 to 8.4). Age-specific trends revealed declining crude mortality rates (CMR) across all groups until 2016, followed by increases, particularly in the 65-74 and 75-84 age brackets, with APCs of 14.1 (95% CI: 7.8 to 27.8) and 8.9 (95% CI: 3.8 to 21.8), respectively. Gender disparities showed men and women had similar trends, with declines until 2015-2016 followed by surges, with APCs of 6.8 (95% CI: 5.2 to 9.1) and 6.6 (95% CI: 4.6 to 11.1), respectively. Racial disparities highlighted steady declines until 2016, followed by increases in non-Hispanic Whites (APC = 10.4, 95% CI: 5.2 to 23.2) and Hispanics (APC = 7.5, 95% CI: 6.0 to 10.1). Geographically, the Midwest exhibited the highest AAMR (71.1), while the Northeast showed the lowest (51.4). State-level disparities revealed North Dakota with the highest AAMR (129.5), contrasting with Nevada, which had the lowest (20.4). Urban-rural differences showed similar trends, with notable AAMR increases in both settings post-2016. These results underscore significant demographic and regional disparities in hypothyroidism and HF-related mortality. Conclusion: While mortality from hypothyroidism and HF among older adults declined until 2016, trends have since reversed across all demographic and geographic strata. Addressing these rising rates require targeted interventions focusing on high-risk groups and areas. Presentation: Monday, July 14, 2025

Abstract Disclosure: E.M. Lewiecki: Amgen Inc, Kyowa Kirin, Ultragenyx, Angitia, Radius Health, Inc, Ascendis. E. Kapoor: Fresenius Kabi USA Inc., Astellas Pharma, Estetra SRL, WellFound Inc., Exeltis. S. Hurtado: None. V.M. Navarro: Bayer, Inc. M. Torres: Bayer, Inc. J. Beau: Bayer, Inc. I. Gkioni: Syneos Health LLC (providing service to Bayer), AstraZeneca. K. Genga: Bayer, Inc.. Background: The neuropeptide substance-P and its receptor neurokinin-1 (SP-NK1R pathway) play a role in bone metabolism and remodelling. Pre-clinical evidence also points to a role of this pathway in energy homeostasis. NK-1R antagonists have been proposed as potential therapies in obesity and musculoskeletal disorders like osteoporosis. Elinzanetant (EZN) is a dual neurokinin-1 and -3 receptor antagonist in late-stage development for vasomotor symptoms (hot flashes) associated with menopause. This post hoc analysis evaluates potential benefits of EZN on the skeleton, body weight, and body composition in postmenopausal women. Methods: Data were gathered from exploratory endpoints of the 52-week (wk), placebo (PL)-controlled, OASIS-3 Phase 3 EZN efficacy and safety trial. Mean percentage (%) change in total bone mass (kg) (measured indirectly by bioelectrical impedance analysis at baseline (BL), wks 4, 8, 12, 18, 24, 36, 52); mean % change in bone mineral density (BMD, measured directly by dual-energy X-ray absorptiometry at BL, wks 24 and 52) in femoral neck, total hip, and lumbar spine; and mean % change in key bone turnover markers osteocalcin (OC) and procollagen 1N-terminal propeptide (P1NP) at BL, wks 4, 8, 12, 18, 24, 36, 52 were evaluated. Weight, body mass index (BMI: weight/height2), waist circumference (WC), fat mass index (FMI; fat mass/height2), lean mass index (LMI; lean mass/height2) and body water were measured to monitor body composition at BL and wks 4, 8, 12, 18, 24, 36, 52. A sub-analysis was performed based on FMI at baseline (FMI ≤9 normal fat mass; >9 excess fat mass). Descriptive statistics were used to evaluate all parameters and trends. Results: From BL to wk 52, increasing trends in bone mass were observed with EZN (mean [SD]: 2.81 [1.02] to 2.95 [1.96]) but not PL (mean [SD]: 2.87 [1.09] to 2.87 [1.13]). In parallel, lower BMD reductions were seen in EZN vs PL at all skeletal sites [EZN vs PL, mean % change from BL: femoral neck (0.00% vs -1.22%), total hip (-0.70% vs -1.37%), and lumbar spine (-0.57% vs -1.22%), with considerable variability in both groups (SD range 3.01 - 4.70)]. Lower levels of circulating OC and P1NP were consistently observed over 52 wks of EZN treatment, suggesting a lower rate of bone resorption with EZN vs PL. Trending reductions in weight, BMI, and WC, along with increases in LMI and body water were observed with EZN vs PL. Trends of higher LMI in patients with excess fat, or lower FMI in patients with normal fat at BL were observed with EZN, suggestive of a positive body re-composition with EZN. Conclusions: These data expand on EZN safety profile and further point to novel potential benefits for the skeleton and body composition of postmenopausal women. Further research is warranted to provide conclusive evidence of the benefits of EZN specifically in post-menopausal women with obesity/overweight status or osteoporosis. Sponsorship: Bayer U.S., Whippany, NJ, USA Presentation: Monday, July 14, 2025

Abstract Disclosure: L. Miller-Wilson: Employee of Immunovant, Inc. N. Princic: Employee of Merative. K. Evans: Employee of Merative. N. Atreja: Employee of Immunovant, Inc. K. Tollefsen: Employee of Immunovant, Inc.. D. Toro-Tobón: None. Objectives: Graves’ disease (GD) is an autoimmune condition responsible for most cases of hyperthyroidism in the United States. An estimated 20%-50% of patients with GD will also develop thyroid eye disease (TED). Current treatments for GD focus on managing hyperthyroidism, but frequent monitoring, dose adjustments, and the high rate of relapse after discontinuation of antithyroid drugs can increase treatment costs and complicate long-term management. This study describes healthcare resource utilization (HCRU) and costs among patients with GD, with and without TED. Methods: This retrospective analysis utilized claims data from the Merative™ MarketScan® Research Databases. Individuals aged ≥18 years with ≥2 claims for a GD diagnosis from January 1, 2017-December 31, 2023 were included (first claim = index). To ensure a newly diagnosed cohort, patients with a history of GD-specific treatment or a GD diagnosis in the 12 months preceding the index were excluded. The final GD cohort was stratified into patients who had evidence of TED at any time during the 12-month pre-index period through 90 days post-index, and those who did not. Propensity score matching was used to balance patients with GD (with and without TED) with non-GD controls (1:3) on demographic and baseline clinical characteristics. Both GD cases (with and without TED) and controls were required to have ≥12 months of post-index follow-up. HCRU and costs were compared between cases and controls during a fixed 12-month post-index period. Categorical outcomes were compared using chi-squared tests, while continuous endpoints were compared using paired t-tests. Results: The analysis included 1,767 GD cases with TED matched with 5,301 controls (mean age, 53.1 years [standardized mean difference (SMD), 0.00]; 77% female [SMD, 0.00]; mean Charlson comorbidity score, 0.9 [SMD, 0.02]) and 43,120 GD cases without TED matched with 129,360 controls (mean age, 49.8 years [SMD, 0.00]; 78% female [SMD, 0.00]; mean Charlson comorbidity score, 0.7 [SMD, 0.01]). Compared with matched controls, patients with GD and TED had 78% more inpatient visits (0.16 vs 0.09), 104% more outpatient visits (65.06 vs 31.86), and 43% more prescriptions (30.21 vs 21.13) during the 12-month post-index period, while patients with GD without TED had 75% more inpatient visits (0.14 vs 0.08), 83% more outpatient visits (52.15 vs 28.48), and 38% more prescriptions (24.27 vs 17.56) (p<0.001 for all). Annual mean healthcare costs were 305% higher ($56,584 vs. $13,981) among GD patients with TED and 65% higher ($19,913 vs $12,076) in those without TED compared with matched controls. Conclusion: Patients with GD had significantly higher HCRU and healthcare costs than matched controls in the 12 months following diagnosis, and this difference was notably greater among GD patients who also had TED. More effective treatments are needed to address the health and financial burden of GD. Presentation: Monday, July 14, 2025