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A Study of Tirzepatide (LY3298176) Once a Week Versus Insulin Glargine Once a Day in Participants With Type 2 Diabetes and Increased Cardiovascular Risk

Efficacy and Safety of LY3298176 Once Weekly Versus Insulin Glargine in Patients With Type 2 Diabetes and Increased Cardiovascular Risk (SURPASS-4)

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03730662
Acronym
SURPASS-4
Enrollment
2002
Registered
2018-11-05
Start date
2018-11-20
Completion date
2021-04-22
Last updated
2022-02-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Type 2 Diabetes Mellitus

Keywords

GIP, GLP-1, glucose metabolism disorders, metabolic diseases, endocrine system diseases, cardiovascular risk

Brief summary

The purpose of the trial is to assess the efficacy and safety of tirzepatide taken once a week to insulin glargine taken once daily in participants with type 2 diabetes and increased cardiovascular risk. The study will last about 108 weeks and may include up to 30 visits.

Interventions

DRUGTirzepatide

Administered SC.

DRUGInsulin Glargine

Administered SC

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Participants must: * Have been diagnosed with type 2 diabetes mellitus (T2DM) * Have HbA1c between ≥7.5% and ≤10.5% * Be on stable treatment with unchanged dose of at least 1 and no more than 3 types of oral antihyperglycemic drugs, which may only include metformin, SGLT-2 inhibitors, and/or sulfonylureas for at least 3 months before screening * Have increased risk for cardiovascular (CV) events * Be of stable weight (± 5%) * Have a BMI ≥25 kilograms per meter squared (kg/m2) at screening

Exclusion criteria

Participants must not: * Have type 1 diabetes mellitus * Have had chronic or acute pancreatitis any time prior to study entry * Have proliferative diabetic retinopathy or diabetic maculopathy or nonproliferative diabetic retinopathy requiring immediate or urgent treatment * Have disorders associated with slowed emptying of the stomach, or have had any stomach surgeries for the purpose of weight loss * Have acute or chronic hepatitis, signs and symptoms of any other liver disease, or blood alanine transaminase (ALT) enzyme level \>3.0 times the upper limit of normal (ULN) for the reference range, as determined by the central laboratory. Participants with nonalcoholic fatty liver disease (NAFLD) are eligible for participation in this trial only if there ALT level is ≤3.0 the ULN for the reference range * Have had a heart attack, stroke, or hospitalization for congestive heart failure in the past 2 months * Have a personal or family history of medullary thyroid carcinoma or personal history of multiple endocrine neoplasia syndrome type 2 * Have been taking any other diabetes medicines other than metformin, SGLT-2 inhibitors, and/or sulfonylureas during the last 3 months * Have been taking weight loss drugs, including over-the-counter medications during the last 3 months

Design outcomes

Primary

MeasureTime frameDescription
Change From Baseline in Hemoglobin A1c (HbA1c) (10 mg and 15 mg)Baseline, Week 52HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. Least Squares (LS) mean was determined by mixed-model repeated measures (MMRM) model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline sodium-glucose co-transporter-2 inhibitor (SGLT-2i) use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Secondary

MeasureTime frameDescription
Change From Baseline in Body WeightBaseline, Week 52LS mean was determined by MMRM model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline HbA1c Group (\<=8.5%, \>8.5%) + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).
Percentage of Participants With HbA1c of <7.0%Week 52HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. Imputed data includes observed value and imputed value if endpoint measure is missing.
Change From Baseline in Fasting Serum GlucoseBaseline, Week 52LS mean was determined by MMRM model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline HbA1c Group (\<=8.5%, \>8.5%) + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).
Change From Baseline in HbA1c (5 mg)Baseline, Week 52HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. LS mean was determined by MMRM model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).
Pharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide1 to 24 hours, 24 to 96 hours, or 120 to 168 hours post dose of Week 7, 15, 23, 35Pharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide
Rate of Hypoglycemia With Blood Glucose <54 Milligram/Deciliter (mg/dL) [<3.0 (Millimole/Liter (mmol/L))] or Severe HypoglycemiaBaseline through Week 52The hypoglycemia events were defined by participant reported events with blood glucose \<54mg/dL (\<3.0 mmol/L) or severe hypoglycemia. Severe hypoglycemia is defined as an episode with severe cognitive impairment requiring the assistance of another person to actively administer carbohydrate, glucagon, or other resuscitative actions. These episodes may be associated with sufficient neuroglycopenia to induce seizure or coma. Post-baseline comparisons between treatment and control group was evaluated using negative binomial model with variables : Number of episodes = Baseline HbA1c Group (\<=8.5%, \>8.5%) + Pooled Country + Baseline SGLT-2i use Flag (Yes, No) + Treatment, with log (exposure in days/365.25) as an offset variable
Mean Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) ValuesBaseline, Week 52The self-monitored plasma glucose (SMBG) data were collected at the following 7 time points: Morning Premeal - Fasting, Morning 2-hour Postmeal, Midday Premeal, Midday 2-hour Postmeal, Evening Premeal, Evening 2-hour Postmeal and Bedtime. LS mean was determined by mixed-model repeated measures (MMRM) model with variables Baseline + Pooled Country + Baseline HbA1c Group (\<=8.5%, \>8.5%) + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Countries

Argentina, Australia, Brazil, Canada, Greece, Israel, Mexico, Poland, Puerto Rico, Romania, Russia, Slovakia, Spain, Taiwan, United States

Participant flow

Participants by arm

ArmCount
5 mg Tirzepatide
5 milligrams (mg) tirzepatide administered subcutaneously (SC) once a week.
329
10 mg Tirzepatide
10 mg tirzepatide administered SC once a week.
330
15 mg Tirzepatide
15 mg tirzepatide administered SC once a week.
338
Insulin Glargine
Insulin glargine administered SC once a day. Doses were individualized and titrated according to protocol-defined targets. The starting dose of insulin glargine was 10 IU/day at bedtime, titrated to a FBG \<100 mg/dL, following a treat-to-target (TTT) algorithm.
1,005
Total2,002

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Treatment Period (52 Weeks)Adverse Event3203
Treatment Period (52 Weeks)Death6229
Treatment Period (52 Weeks)Lost to Follow-up42211
Treatment Period (52 Weeks)Personal Reason2202
Treatment Period (52 Weeks)Physician Decision1103
Treatment Period (52 Weeks)Protocol Violation0101
Treatment Period (52 Weeks)Screen Failure0100
Treatment Period (52 Weeks)Withdrawal by Subject50523
Variable Treatment PeriodAdverse Event1207
Variable Treatment PeriodDeath90626
Variable Treatment PeriodLost to Follow-up21411
Variable Treatment PeriodPersonal Reason0216
Variable Treatment PeriodPhysician Decision0003
Variable Treatment PeriodProtocol Violation0111
Variable Treatment PeriodWithdrawal by Subject21417

Baseline characteristics

CharacteristicTotalInsulin Glargine15 mg Tirzepatide10 mg Tirzepatide5 mg Tirzepatide
Age, Continuous63.60 years
STANDARD_DEVIATION 8.56
63.80 years
STANDARD_DEVIATION 8.51
63.70 years
STANDARD_DEVIATION 8.6
63.70 years
STANDARD_DEVIATION 8.68
62.90 years
STANDARD_DEVIATION 8.56
Ethnicity (NIH/OMB)
Hispanic or Latino
951 Participants478 Participants155 Participants164 Participants154 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
1036 Participants521 Participants179 Participants164 Participants172 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
15 Participants6 Participants4 Participants2 Participants3 Participants
Hemoglobin A1c8.52 Percentage of HbA1c
STANDARD_DEVIATION 0.88
8.50 Percentage of HbA1c
STANDARD_DEVIATION 0.85
8.52 Percentage of HbA1c
STANDARD_DEVIATION 0.98
8.59 Percentage of HbA1c
STANDARD_DEVIATION 0.91
8.52 Percentage of HbA1c
STANDARD_DEVIATION 0.84
Race (NIH/OMB)
American Indian or Alaska Native
174 Participants86 Participants26 Participants30 Participants32 Participants
Race (NIH/OMB)
Asian
70 Participants31 Participants8 Participants16 Participants15 Participants
Race (NIH/OMB)
Black or African American
76 Participants34 Participants11 Participants18 Participants13 Participants
Race (NIH/OMB)
More than one race
43 Participants24 Participants5 Participants6 Participants8 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
3 Participants1 Participants2 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
4 Participants2 Participants1 Participants0 Participants1 Participants
Race (NIH/OMB)
White
1632 Participants827 Participants285 Participants260 Participants260 Participants
Region of Enrollment
Argentina
484 Participants242 Participants82 Participants80 Participants80 Participants
Region of Enrollment
Australia
19 Participants9 Participants4 Participants3 Participants3 Participants
Region of Enrollment
Brazil
250 Participants125 Participants42 Participants41 Participants42 Participants
Region of Enrollment
Canada
51 Participants27 Participants7 Participants9 Participants8 Participants
Region of Enrollment
Greece
38 Participants19 Participants7 Participants5 Participants7 Participants
Region of Enrollment
Israel
29 Participants15 Participants5 Participants5 Participants4 Participants
Region of Enrollment
Mexico
160 Participants80 Participants26 Participants27 Participants27 Participants
Region of Enrollment
Poland
156 Participants78 Participants26 Participants25 Participants27 Participants
Region of Enrollment
Romania
82 Participants41 Participants14 Participants14 Participants13 Participants
Region of Enrollment
Russia
88 Participants45 Participants15 Participants14 Participants14 Participants
Region of Enrollment
Slovakia
199 Participants100 Participants34 Participants32 Participants33 Participants
Region of Enrollment
Spain
77 Participants38 Participants14 Participants14 Participants11 Participants
Region of Enrollment
Taiwan
30 Participants15 Participants5 Participants5 Participants5 Participants
Region of Enrollment
United States
339 Participants171 Participants57 Participants56 Participants55 Participants
Sex: Female, Male
Female
751 Participants364 Participants135 Participants121 Participants131 Participants
Sex: Female, Male
Male
1251 Participants641 Participants203 Participants209 Participants198 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
15 / 3292 / 3288 / 33835 / 1,000
other
Total, other adverse events
112 / 329158 / 328184 / 338192 / 1,000
serious
Total, serious adverse events
48 / 32954 / 32841 / 338193 / 1,000

Outcome results

Primary

Change From Baseline in Hemoglobin A1c (HbA1c) (10 mg and 15 mg)

HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. Least Squares (LS) mean was determined by mixed-model repeated measures (MMRM) model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline sodium-glucose co-transporter-2 inhibitor (SGLT-2i) use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Time frame: Baseline, Week 52

Population: All randomized participants who received at least one dose of study drug and had a baseline and at least 1 post-baseline value, excluding participants discontinuing study drug due to inadvertent enrollment

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
10 mg TirzepatideChange From Baseline in Hemoglobin A1c (HbA1c) (10 mg and 15 mg)-2.43 Percentage of HbA1cStandard Error 0.053
15 mg TirzepatideChange From Baseline in Hemoglobin A1c (HbA1c) (10 mg and 15 mg)-2.58 Percentage of HbA1cStandard Error 0.053
Insulin GlargineChange From Baseline in Hemoglobin A1c (HbA1c) (10 mg and 15 mg)-1.44 Percentage of HbA1cStandard Error 0.03
p-value: <0.00197.5% CI: [-1.13, -0.86]Mixed Models Analysis
p-value: <0.00197.5% CI: [-1.28, -1]Mixed Models Analysis
Secondary

Change From Baseline in Body Weight

LS mean was determined by MMRM model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline HbA1c Group (\<=8.5%, \>8.5%) + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Time frame: Baseline, Week 52

Population: All randomized participants who received at least one dose of study drug and had a baseline and at least 1 post-baseline value, excluding participants discontinuing study drug due to inadvertent enrollment

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
10 mg TirzepatideChange From Baseline in Body Weight-7.1 Kilograms (kg)Standard Error 0.34
15 mg TirzepatideChange From Baseline in Body Weight-9.5 Kilograms (kg)Standard Error 0.34
Insulin GlargineChange From Baseline in Body Weight-11.7 Kilograms (kg)Standard Error 0.33
Insulin GlargineChange From Baseline in Body Weight1.9 Kilograms (kg)Standard Error 0.19
p-value: <0.00195% CI: [-9.8, -8.3]Mixed Models Analysis
p-value: <0.00195% CI: [-12.1, -10.6]Mixed Models Analysis
p-value: <0.00195% CI: [-14.3, -12.8]Mixed Models Analysis
Secondary

Change From Baseline in Fasting Serum Glucose

LS mean was determined by MMRM model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline HbA1c Group (\<=8.5%, \>8.5%) + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Time frame: Baseline, Week 52

Population: All randomized participants who received at least one dose of study drug and had a baseline and at least 1 post-baseline value, excluding participants discontinuing study drug due to inadvertent enrollment

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
10 mg TirzepatideChange From Baseline in Fasting Serum Glucose-50.4 milligram per Deciliter (mg/dL)Standard Error 2.07
15 mg TirzepatideChange From Baseline in Fasting Serum Glucose-54.9 milligram per Deciliter (mg/dL)Standard Error 2.06
Insulin GlargineChange From Baseline in Fasting Serum Glucose-59.3 milligram per Deciliter (mg/dL)Standard Error 2.04
Insulin GlargineChange From Baseline in Fasting Serum Glucose-51.4 milligram per Deciliter (mg/dL)Standard Error 1.17
p-value: 0.67295% CI: [-3.7, 5.7]Mixed Models Analysis
p-value: 0.13495% CI: [-8.2, 1.1]Mixed Models Analysis
p-value: <0.00195% CI: [-12.6, -3.4]Mixed Models Analysis
Secondary

Change From Baseline in HbA1c (5 mg)

HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. LS mean was determined by MMRM model for post-baseline measures: Variable = Baseline + Pooled Country + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Time frame: Baseline, Week 52

Population: All randomized participants who received at least one dose of study drug and had a baseline and at least 1 post-baseline value, excluding participants discontinuing study drug due to inadvertent enrollment

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
10 mg TirzepatideChange From Baseline in HbA1c (5 mg)-2.24 Percentage of HbA1cStandard Error 0.053
15 mg TirzepatideChange From Baseline in HbA1c (5 mg)-1.44 Percentage of HbA1cStandard Error 0.03
p-value: <0.00197.5% CI: [-0.93, -0.66]Mixed Models Analysis
Secondary

Mean Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values

The self-monitored plasma glucose (SMBG) data were collected at the following 7 time points: Morning Premeal - Fasting, Morning 2-hour Postmeal, Midday Premeal, Midday 2-hour Postmeal, Evening Premeal, Evening 2-hour Postmeal and Bedtime. LS mean was determined by mixed-model repeated measures (MMRM) model with variables Baseline + Pooled Country + Baseline HbA1c Group (\<=8.5%, \>8.5%) + Baseline SGLT-2i use Flag (Yes, No) + Treatment + Time + Treatment\*Time (Type III sum of squares).

Time frame: Baseline, Week 52

Population: All randomized participants who received at least one dose of study drug, excluding participants discontinuing study drug due to inadvertent enrollment

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
10 mg TirzepatideMean Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values-58.4 mg/dLStandard Error 1.65
15 mg TirzepatideMean Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values-61.1 mg/dLStandard Error 1.66
Insulin GlargineMean Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values-66.1 mg/dLStandard Error 1.66
Insulin GlargineMean Change From Baseline in Daily Average 7-Point Self-Monitored Blood Glucose (SMBG) Values-46.1 mg/dLStandard Error 0.96
Secondary

Percentage of Participants With HbA1c of <7.0%

HbA1c is the glycosylated fraction of hemoglobin A. HbA1c is measured primarily to identify average plasma glucose concentration over prolonged periods of time. Imputed data includes observed value and imputed value if endpoint measure is missing.

Time frame: Week 52

Population: All randomized participants who received at least one dose of study drug and had a baseline and at least 1 post-baseline value, excluding participants discontinuing study drug due to inadvertent enrollment

ArmMeasureValue (NUMBER)
10 mg TirzepatidePercentage of Participants With HbA1c of <7.0%80.98 percentage of participants
15 mg TirzepatidePercentage of Participants With HbA1c of <7.0%88.16 percentage of participants
Insulin GlarginePercentage of Participants With HbA1c of <7.0%90.72 percentage of participants
Insulin GlarginePercentage of Participants With HbA1c of <7.0%50.72 percentage of participants
p-value: <0.00195% CI: [3.47, 6.58]Regression, Logistic
p-value: <0.00195% CI: [6.31, 13.49]Regression, Logistic
p-value: <0.00195% CI: [7.88, 17.89]Regression, Logistic
Secondary

Pharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide

Pharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide

Time frame: 1 to 24 hours, 24 to 96 hours, or 120 to 168 hours post dose of Week 7, 15, 23, 35

Population: Pharmacokinetic samples were collected from atleast the first 150 participants at each Tirzepatide dose, all participants aged ≥70 years, and all participants with severe renal impairment or end-stage renal disease (ESRD) (estimated glomerular filtration rate \[eGFR\] \<30 mL/min)

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
10 mg TirzepatidePharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide81800 Nanograms per millilitre per hourGeometric Coefficient of Variation 23.9
15 mg TirzepatidePharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide165000 Nanograms per millilitre per hourGeometric Coefficient of Variation 20.3
Insulin GlarginePharmacokinetics (PK): Steady State Area Under the Concentration Time Curve From Zero to Tau (AUC 0-Tau) of Tirzepatide246000 Nanograms per millilitre per hourGeometric Coefficient of Variation 20.6
Secondary

Rate of Hypoglycemia With Blood Glucose <54 Milligram/Deciliter (mg/dL) [<3.0 (Millimole/Liter (mmol/L))] or Severe Hypoglycemia

The hypoglycemia events were defined by participant reported events with blood glucose \<54mg/dL (\<3.0 mmol/L) or severe hypoglycemia. Severe hypoglycemia is defined as an episode with severe cognitive impairment requiring the assistance of another person to actively administer carbohydrate, glucagon, or other resuscitative actions. These episodes may be associated with sufficient neuroglycopenia to induce seizure or coma. Post-baseline comparisons between treatment and control group was evaluated using negative binomial model with variables : Number of episodes = Baseline HbA1c Group (\<=8.5%, \>8.5%) + Pooled Country + Baseline SGLT-2i use Flag (Yes, No) + Treatment, with log (exposure in days/365.25) as an offset variable

Time frame: Baseline through Week 52

Population: All randomized participants who received at least one dose of study drug, excluding participants hypoglycemic events occurring after initiation of a new antihyperglycemic therapy

ArmMeasureValue (MEAN)Dispersion
10 mg TirzepatideRate of Hypoglycemia With Blood Glucose <54 Milligram/Deciliter (mg/dL) [<3.0 (Millimole/Liter (mmol/L))] or Severe Hypoglycemia0.10 Episodes/participant/365.25 daysStandard Error 0.023
15 mg TirzepatideRate of Hypoglycemia With Blood Glucose <54 Milligram/Deciliter (mg/dL) [<3.0 (Millimole/Liter (mmol/L))] or Severe Hypoglycemia0.09 Episodes/participant/365.25 daysStandard Error 0.025
Insulin GlargineRate of Hypoglycemia With Blood Glucose <54 Milligram/Deciliter (mg/dL) [<3.0 (Millimole/Liter (mmol/L))] or Severe Hypoglycemia0.11 Episodes/participant/365.25 daysStandard Error 0.03
Insulin GlargineRate of Hypoglycemia With Blood Glucose <54 Milligram/Deciliter (mg/dL) [<3.0 (Millimole/Liter (mmol/L))] or Severe Hypoglycemia0.35 Episodes/participant/365.25 daysStandard Error 0.044

Source: ClinicalTrials.gov · Data processed: Feb 21, 2026