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SURMOUNT-J
CompletedPhase 3Results postedA Study of Tirzepatide (LY3298176) in Participants With Obesity Disease
Efficacy and Safety of Once-Weekly Tirzepatide in Participants With Obesity Disease: A Randomized, Double-Blind, Placebo-Controlled Trial (SURMOUNT-J)
Lead sponsor
Asset
Tirzepatide
Subcutaneous · GLP-1 / GIP dual
Listed sites
18
Recruiting sites
—
Enrollment
267
actual
Study population
Obesity / overweight
Key I/E criterion
•BMI ≥27
Primary endpoints
•Body weight, % change•≥5% weight-loss responders
Footprint
Where this trial recruits
Site locations as reported to ClinicalTrials.gov. Site count is not enrollment count; per-site enrollment is not available from source.
Identifiers
Registered as
Timeline
Milestones
Assets
Investigational agents
Study populations
Who this study enrolls
Eligibility
Who can enroll
Inclusion criteria
Exclusion criteria
Endpoints (52)
What's being measured
Protocol endpoints and posted registry outcome measures, grouped into outcome categories. Composite endpoints show their component event types. Standard codes (LOINC, SNOMED CT) are shown where available.
Coverage by outcome category
Weight & body composition
22 endpointsMean Percent Change in Body Weight
Time frame:Baseline, 72 Weeks
Body weight, % change
percent change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Percent change | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -17.8 | — |
| 15 mg Tirzepatide | -22.7 | — |
| Placebo | -1.7 | — |
Percentage of Participants Who Achieve ≥5% Body Weight Reduction
Time frame:Week 72
≥5% weight-loss responders
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 94.37 | — |
| 15 mg Tirzepatide | 96.05 | — |
| Placebo | 20 | — |
Mean Percent Change in Body Weight
Time frame:Baseline, 72 Weeks
Body weight, % change
percent change from baseline, improvement
Percentage of Participants Who Achieve ≥5% Body Weight Reduction
Time frame:Week 72
≥5% weight-loss responders
threshold achievement, improvement
Percentage of Participants Who Achieve ≥10% Body Weight Reduction
Time frame:Week 72
≥10% weight-loss responders
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 85.92 | — |
| 15 mg Tirzepatide | 92.11 | — |
| Placebo | 4 | — |
Percentage of Participants Who Achieve ≥15% Body Weight Reduction
Time frame:Week 72
≥15% weight-loss responders
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 63.38 | — |
| 15 mg Tirzepatide | 82.89 | — |
| Placebo | 1.33 | — |
Change From Baseline in Absolute Body Weight
Time frame:Baseline, Week 72
Body weight, absolute change (kg)
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), kilograms (kg) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -16.0 | — |
| 15 mg Tirzepatide | -20.8 | — |
| Placebo | -1.5 | — |
Change From Baseline in Body Mass Index (BMI)
Time frame:Baseline, Week 72
BMI, change
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), kilograms per metres squared (kg/m^2) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -5.8 | — |
| 15 mg Tirzepatide | -7.7 | — |
| Placebo | -0.6 | — |
Percent Change From Baseline in Visceral Adipose Tissue (VAT)
Time frame:Baseline, Week 72
Visceral fat, change
percent change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Percent change | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -39.4 | — |
| 15 mg Tirzepatide | -44.5 | — |
| Placebo | -3.4 | — |
Percent Change From Baseline in Subcutaneous Adipose Tissue (SAT)
Time frame:Baseline, Week 72
Subcutaneous fat, change
percent change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Percent change | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -32.2 | — |
| 15 mg Tirzepatide | -36.5 | — |
| Placebo | -5.0 | — |
Change From Baseline in VAT/SAT Ratio
Time frame:Baseline, Week 72
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), ratio | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -0.09 | — |
| 15 mg Tirzepatide | -0.08 | — |
| Placebo | 0.01 | — |
Percentage of Participants Who Achieved VAT <100 Square Centimeter (cm²) From Baseline for Participants With VAT≥100 cm² at Baseline
Time frame:Week 72
Visceral fat, change
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 26.32 | — |
| 15 mg Tirzepatide | 37.10 | — |
| Placebo | 1.64 | — |
Change From Baseline in Waist Circumference
Time frame:Baseline, Week 72
Waist circumference, change
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), centimeters (cm) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -12.7 | — |
| 15 mg Tirzepatide | -16.6 | — |
| Placebo | -1.3 | — |
Percentage of Participants Who Achieve ≥10% Body Weight Reduction
Time frame:Week 72
≥10% weight-loss responders
threshold achievement, improvement
Percentage of Participants Who Achieve ≥15% Body Weight Reduction
Time frame:Week 72
≥15% weight-loss responders
threshold achievement, improvement
Change From Baseline in Absolute Body Weight
Time frame:Baseline, Week 72
Body weight, absolute change (kg)
change from baseline, improvement
Change From Baseline in Body Mass Index (BMI)
Time frame:Baseline, Week 72
BMI, change
change from baseline, improvement
Percent Change From Baseline in Visceral Adipose Tissue (VAT)
Time frame:Baseline, Week 72
Visceral fat, change
percent change from baseline, improvement
Percent Change From Baseline in Subcutaneous Adipose Tissue (SAT)
Time frame:Baseline, Week 72
Subcutaneous fat, change
percent change from baseline, improvement
Change From Baseline in VAT/SAT Ratio
Time frame:Baseline, Week 72
change from baseline, improvement
Percentage of Participants Who Achieved VAT <100 Square Centimeter (cm²) From Baseline for Participants With VAT≥100 cm² at Baseline
Time frame:Week 72
Visceral fat, change
threshold achievement, improvement
Change From Baseline in Waist Circumference
Time frame:Baseline, Week 72
Waist circumference, change
change from baseline, improvement
Glycemic / diabetes
10 endpointsChange From Baseline in Fasting Glucose for Participants With IGT at Baseline
Time frame:Baseline, Week 72
Fasting glucose, change
change from baseline, improvement
LOINC 1558-6
Posted result
| Group | Value (least_squares_mean), milligrams per deciliter (mg/dL) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -12.81 | — |
| 15 mg Tirzepatide | -10.61 | — |
| Placebo | 2.19 | — |
Change From Baseline in Oral Glucose Tolerance (OGTT) 2-hr Glucose for Participants With Impaired Glucose Tolerance (IGT) at Baseline
Time frame:Baseline, Week 72
Postprandial glucose
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), milligrams per deciliter (mg/dL) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -61.50 | — |
| 15 mg Tirzepatide | -70.56 | — |
| Placebo | -5.74 | — |
Percentage of Participants Who Achieved Improvements of IGT
Time frame:Week 72
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 92.50 | — |
| 15 mg Tirzepatide | 97.83 | — |
| Placebo | 28.0 | — |
Change From Baseline in Hemoglobin A1c (HbA1c)
Time frame:Baseline, Week 72
HbA1c, change
change from baseline, improvement
LOINC 4548-4
Posted result
| Group | Value (least_squares_mean), Percentage of HbA1c | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -0.67 | — |
| 15 mg Tirzepatide | -0.68 | — |
| Placebo | -0.02 | — |
Change From Baseline in Fasting Insulin for Participants With IGT at Baseline
Time frame:Baseline, Week 72
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), milli-international units/liter (mIU/L) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -6.04 | — |
| 15 mg Tirzepatide | -6.69 | — |
| Placebo | -2.13 | — |
Change From Baseline in Fasting Glucose for Participants With IGT at Baseline
Time frame:Baseline, Week 72
Fasting glucose, change
change from baseline, improvement
LOINC 1558-6
Change From Baseline in Oral Glucose Tolerance (OGTT) 2-hr Glucose for Participants With Impaired Glucose Tolerance (IGT) at Baseline
Time frame:Baseline, Week 72
Postprandial glucose
change from baseline, improvement
Percentage of Participants Who Achieved Improvements of IGT
Time frame:Week 72
threshold achievement, improvement
Change From Baseline in Hemoglobin A1c (HbA1c)
Time frame:Baseline, Week 72
HbA1c, change
change from baseline, improvement
LOINC 4548-4
Change From Baseline in Fasting Insulin for Participants With IGT at Baseline
Time frame:Baseline, Week 72
change from baseline, improvement
MASH / liver
4 endpointsPercent Change From Baseline in Hepatic Fat Fraction (HFF) for Participants With Non-alcoholic Fatty Liver Disease [NAFLD]
Time frame:Baseline, Week 72
Liver fat content, change
percent change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Percent change | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -63.9 | — |
| 15 mg Tirzepatide | -69.9 | — |
| Placebo | -19.6 | — |
Percentage of Participants Who Achieved Improvements of NAFLD
Time frame:Week 72
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 69.49 | — |
| 15 mg Tirzepatide | 77.42 | — |
| Placebo | 9.84 | — |
Percent Change From Baseline in Hepatic Fat Fraction (HFF) for Participants With Non-alcoholic Fatty Liver Disease [NAFLD]
Time frame:Baseline, Week 72
MRI-PDFF, % change
percent change from baseline, improvement
Percentage of Participants Who Achieved Improvements of NAFLD
Time frame:Week 72
threshold achievement, improvement
Cardiometabolic biomarkers
8 endpointsPercent Change From Baseline in Fasting Lipids [Triglycerides (TG)] for Participants With Hyperlipidemia at Baseline
Time frame:Baseline, Week 72
Triglycerides, change
percent change from baseline, improvement
LOINC 2571-8
Posted result
| Group | Value (least_squares_mean), Percent change | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -47.3 | — |
| 15 mg Tirzepatide | -50.6 | — |
| Placebo | -11.0 | — |
Percentage of Participants Who Achieved Improvements of Hyperlipidemia
Time frame:Week 72
categorical status, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 72.41 | — |
| 15 mg Tirzepatide | 81.08 | — |
| Placebo | 25 | — |
Change From Baseline in Systolic Blood Pressure
Time frame:Baseline, Week 72
Systolic BP, change
change from baseline, improvement
LOINC 8480-6
Posted result
| Group | Value (least_squares_mean), millimeters of Mercury (mmHg) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -11.2 | — |
| 15 mg Tirzepatide | -12.0 | — |
| Placebo | 1.9 | — |
Change From Baseline in Diastolic Blood Pressure
Time frame:Baseline, Week 72
Diastolic BP, change
change from baseline, improvement
LOINC 8462-4
Posted result
| Group | Value (least_squares_mean), millimeters of Mercury (mmHg) | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | -5.9 | — |
| 15 mg Tirzepatide | -6.3 | — |
| Placebo | 0.5 | — |
Percent Change From Baseline in Fasting Lipids [Triglycerides (TG)] for Participants With Hyperlipidemia at Baseline
Time frame:Baseline, Week 72
Triglycerides, change
percent change from baseline, improvement
LOINC 2571-8
Percentage of Participants Who Achieved Improvements of Hyperlipidemia
Time frame:Week 72
threshold achievement, improvement
Change From Baseline in Systolic Blood Pressure
Time frame:Baseline, Week 72
Systolic BP, change
change from baseline, improvement
LOINC 8480-6
Change From Baseline in Diastolic Blood Pressure
Time frame:Baseline, Week 72
Diastolic BP, change
change from baseline, improvement
LOINC 8462-4
Patient-reported / QoL
6 endpointsChange From Baseline in Short Form 36 Version 2 Health Survey (SF-36v2) Acute Form Physical Functioning Domain Score
Time frame:Baseline, Week 72
SF-36 physical
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Score on a scale | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 1.1 | — |
| 15 mg Tirzepatide | 2.0 | — |
| Placebo | -0.1 | — |
Change From Baseline in Impact of Weight on Quality-of-Life Lite Clinical Trials Version (IWQOL-Lite-CT) Physical Function Composite Score
Time frame:Baseline, Week 72
IWQOL-Lite physical
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Score on a scale | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 15.2 | — |
| 15 mg Tirzepatide | 13.0 | — |
| Placebo | 2.2 | — |
Change From Baseline in Euro Quality of Life Five Dimensions (EQ-5D-5L)
Time frame:Baseline, Week 72
EQ-5D index
change from baseline, improvement
Posted result
| Group | Value (least_squares_mean), Score on a scale | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 0.01 | — |
| 15 mg Tirzepatide | 0.01 | — |
| Placebo | -0.01 | — |
Change From Baseline in Short Form 36 Version 2 Health Survey (SF-36v2) Acute Form Physical Functioning Domain Score
Time frame:Baseline, Week 72
SF-36 physical
change from baseline, improvement
Change From Baseline in Impact of Weight on Quality-of-Life Lite Clinical Trials Version (IWQOL-Lite-CT) Physical Function Composite Score
Time frame:Baseline, Week 72
IWQOL-Lite physical
change from baseline, improvement
Change From Baseline in Euro Quality of Life Five Dimensions (EQ-5D-5L)
Time frame:Baseline, Week 72
EQ-5D index
change from baseline, improvement
Other clinical outcomes
2 endpointsPercentage of Participants Who Had Improvement in Obesity-related Health Problems
Time frame:Week 72
threshold achievement, improvement
Posted result
| Group | Value (number), Percentage of participants | 95% CI |
|---|---|---|
| 10 mg Tirzepatide | 70.0 | — |
| 15 mg Tirzepatide | 79.69 | — |
| Placebo | 11.11 | — |
Percentage of Participants Who Had Improvement in Obesity-related Health Problems
Time frame:Week 72
threshold achievement, improvement
Publications (3)
Bibliography
Records linked to this trial through ClinicalTrials.gov references, PubMed NCT search, and curated study seeds. 'Canonical' marks design/result papers; others are registry references or candidates.
Registry references + supporting bibliography
- Diabetes, obesity & metabolism2026 Feb (month)PMID41290555doi:10.1111/dom.70315via clinicaltrials gov reference derived + pubmed nct search
- The lancet. Diabetes & endocrinology2025 May (month)PMID40031941doi:10.1016/S2213-8587(24)00377-2via clinicaltrials gov reference derived + pubmed nct search
Provenance
Sources
Trial facts come from public ClinicalTrials.gov records. Endpoint categories are Delfa's classification of those records, not a ClinicalTrials.gov field. All figures reflect the July 1, 2026 snapshot.