Bennett, Pamela K

Background/Objectives: Individuals with type 2 diabetes (T2D) achieve less total body weight loss (TBWL) with obesity medications compared to those without T2D. The individualized metabolic surgery (IMS) score, originally developed to predict T2D remission after bariatric surgery, inversely correlates with TBWL response to semaglutide. IMS reflects T2D severity, incorporating HbA1c and T2D duration and medication use. This study aims to evaluate TBWL with tirzepatide across IMS severity categories and identify predictors of response in a real-world cohort. Methods: This retrospective analysis included 717 adults with T2D using tirzepatide for overweight or obesity within the Mayo Clinic Health System. Patients were stratified by IMS severity (mild, moderate, severe) and quartiles. Primary endpoint: TBWL% at 15 months. Secondary endpoints: categorical thresholds (≥5%, ≥10%, ≥15%, ≥20%) and predictors of TBWL%. Linear mixed-effects models and regression models were employed. Results: At 15 months, TBWL was greater in mild versus severe IMS groups (14.8% vs. 11.0%, p = 0.015), with similar trends across quartiles. The proportion achieving ≥ 20% TBWL was nearly two-fold higher in mild versus severe IMS (27% vs. 14%, p = 0.03). Female sex independently predicted greater TBWL, whereas insulin use, higher T2D medication burden (particularly weight-promoting agents), and HbA1c > 7% were associated with less TBWL. Conclusions: Tirzepatide produced clinically meaningful TBWL across all IMS categories, although TBWL declined with increasing IMS severity. Glycemic control and T2D medication use emerged as strong predictors of TBWL. The IMS score may serve as a practical tool to anticipate weight-loss trajectories, guide personalized treatment decisions, and inform patient counseling.

Abstract Disclosure: R. Castaneda: None. D. Bechenati: None. R.D. Rivera Gutierrez: None. M.A. Espinosa: None. J.L. Villamarin: None. E. Tama: None. J.L. Meek: None. P. Bennett: None. A. Acosta: Novo Nordisk, Gila Therapeutics, Amgen Inc, Regeneron Pharmaceuticals, Boehringer Ingelheim, Rhythm Pharmaceuticals, General Mills, Currax, Nestle, Phenomix Sciences, Busch Health, RareDiseases, National Institute of Health, Vivus Pharmaceuticals, Apollo Endosurgery, Satiogen Pharmaceuticals, Spatz Medical. S. Faubion: Era Women’s Health Platform, PriMed, MedAll, AiCME, Medscape, Weight Watchers. C. Shufelt: Bayer Advisory Board. M.D. Hurtado: Novo Nordisk, National Institute of Health, Phenomix. Introduction: Tirzepatide, a dual GIP and GLP-1 receptor agonist, is an FDA-approved medication demonstrating the highest efficacy for weight loss among currently available treatments. However, the influence of sex and age on weight loss outcomes with tirzepatide remains unclear. Objective: To investigate the influence of sex and age on weight loss outcomes in patients treated with tirzepatide. Methods: This retrospective study evaluated weight loss outcomes associated with tirzepatide across sex and age groups. Patients with active malignancy, prior bariatric surgery, or concurrent anti-obesity medication were excluded. The primary endpoint was total body weight loss percentage (TBWL%) at 15 months by sex and age. The influence of age was analyzed as a categorical (≤45, 46-59, ≥60 years) and continuous variable. Secondary outcomes included TBWL% at 3, 6, 9, and 12 months by sex and age. Data were analyzed using independent t-tests, one-way ANOVA, and multivariate regression; results are reported as mean ± standard deviation. Results: The study included 1033 patients (57.1% female; mean age 56 ± 11 years; mean BMI, 37.7 ± 8 kg/m2). By age category, 18.8% (196) were ≤45 years (35.7% males, 64.3% females), 45.9% (473) were 46-59 years (42.7% males, 57.3% females), and 35.3% (364) were ≥60 years (54.7% males, 45.3% females). At all timepoints, TBWL was significantly greater in females compared to males at all timepoints. At 15 months females had a higher TBWL than males: 15.3% ± 10, n=340, vs. 10.2% ± 8, n=244, (p < 0.001). Among females, premenopausal women achieved a higher TBWL than postmenopausal women: 16.9% ± 10 vs 14.4% ± 9, p = 0.04. Analysis by age groups revealed a trend toward higher TBWL in younger patients that did not reach statistical significance (p = 0.152): ≤45 years (14.7% ± 10%), 46-59 years (12.9% ± 10%), and ≥60 years (12.7% ± 9%). After adjusting for baseline age, BMI, and diabetes status, sex remained a strong predictor for weight loss outcomes (PE= 4.5, 95% CI [2.96, 5.97], p < 0.001), following type 2 diabetes status (PE= 4.8, 95% CI [3.0, 6.7], p < 0.001). Conclusion: Sex but not age was a strong predictor of weight loss with tirzepatide. Female sex was associated with greater weight loss than male sex. These results emphasize the importance of considering sex-specific factors in weight loss strategies and warrant further investigation into the underlying biological mechanisms. Differential weight loss by menopause, underscores the role of sex hormones. Presentation: Monday, July 14, 2025

Abstract Disclosure: R.D. Rivera Gutierrez: None. D. Bechenati: None. R. Castaneda: None. M.A. Espinosa: None. J.L. Villamarin: None. E. Tama: None. J.L. Meek: None. T.M. Taaffe: None. P.K. Bennett: None. A.J. Acosta: Novo Nordisk, Gila Therapeutics, Rhythm Pharmaceuticals, Amgen Inc, General Mills, Regeneron Pharmaceuticals, Boehringer Ingelheim, Currax, Nestle, Phenomix Sciences, Busch Health, RareDiseases, National Institute of Health, Vivus Pharmaceuticals, Apollo Endosurgery, Satiogen Pharmaceuticals, Spatz Medical. S. Faubion: Era Women’s Health Platform, PriMed, AiCME, MedAll, Medscape, Weight Watchers. C. Shufelt: Bayer Advisory Board. M.D. Hurtado: Novo Nordisk, National Institute of Health, Phenomix Sciences. Background: Glucagon-like peptide-1 receptor agonists (GLP-1 RAs) have demonstrated cardiovascular (CV) benefits. Tirzepatide (TZP), a dual GLP-1 and gastric inhibitory polypeptide (GIP) receptor agonist approved for weight management and glycemic control, currently lacks evidence on CV outcomes. This study evaluates TZP’s impact on cardiometabolic parameters and atherosclerotic cardiovascular disease (ASCVD) risk scores. Methods: We conducted a multicenter retrospective study of adults prescribed TZP from June 1, 2022, to November 1, 2024. Inclusion criteria included 12 months of TZP use and age >18 years. Exclusion criteria were pregnancy, active malignancy, concurrent FDA-approved antiobesity medications, and prior bariatric surgery. Endpoints included changes in blood pressure, lipid profiles, liver enzymes, glucose control parameters, medication use (statins, aspirin, antihypertensives), and ASCVD risk scores from baseline to 12 months, stratified by sex. Data were obtained from electronic medical records. We present data as mean differences [95% CI]. We used T-tests and multivariate regression analyses for analyses. Results: Among 831 participants (59.4% female; 91.2% White; mean age: 58 ± 12 years), 12-month weight loss was -12% [-13, -11], p<0.001. We observed significant improvement in systolic blood pressure (SBP) (-4 [-5, -3] mmHg, p<0.001), triglycerides (TG) (-38 [-52, -23] mg/dL, p<0.001), total cholesterol (TC) (-7 [-10, -4] mg/dL, p<0.001), LDL cholesterol (LDL) (-6 [-9, -4] mg/dL, p<0.001), fasting glucose (FG) (-39 [-48, -29] mg/dL, p<0.001), ALT (-10 [-15, -5] U/L, p<0.001), HbA1c (-1.3% [-1.5, -1.2], p<0.001), and HDL cholesterol (HDL) (+4 [+3, +5] mg/dL, p<0.001). The Lifetime and 10-year ASCVD scores did not significantly change after 12 months (p>0.05), underscoring TZP’s potential in mitigating the aging-associated increase in CV risk. Considering sex, females had greater weight loss (-13% [-14, -12] vs. -10% [-11, -9], p<0.001), and greater improvements in TC (-5% [-8, -2] vs -3% [-6, 0.1], p<0.001) and LDL (-10% [-14, -6] vs -4% [-8, 1], p<0.001). Males had a greater reduction in DBP (-2% [-4, -1] vs (-1% [-6, 3], p=0.006). Both males and females demonstrated similar improvements in FG and HbA1c. Conclusion: TZP significantly improved CV and metabolic parameters after 12 months, with greater benefits observed in females. These improvements effectively mitigated the age-related rise in ASCVD risk scores. Larger, prospective studies are warranted to confirm these findings and further investigate TZP’s long-term CV effects. Presentation: Monday, July 14, 2025