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Completed

NCT Number: NCT01243424

CAROLINA: Cardiovascular Outcome Study of Linagliptin Versus Glimepiride in Patients With Type 2 Diabetes

The aim of the study is to investigate the longterm impact on cardiovascular morbidity and mortality, relevant efficacy parameters (e.g., glycaemic parameters) and safety (e.g., weight and hypoglycaemia) of treatment with linagliptin in patients with type 2 diabetes at elevated cardiovascular risk receiving usual care, and compare outcome against glimepiride.

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Key information

Age range

40 year–85 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Instituto de Investigaciones Clínicas de Bahía Blanca, Bahía Blanca, Argentina

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Type 2 diabetes
  • Elevated glycosylated haemoglobin (HbA1c): 6.5 - 8.5%, inclusive, if treatment naïve or mono-/dual therapy with metformin and/or an alpha-glucosidase inhibitor; 6.5 - 7.5%, inclusive, if treatment with sulphonylurea/glinide in mono- or dual (with metformin OR an alpha-glucosidase inhibitor) therapy)
  • Pre-existing cardiovascular disease OR specified diabetes end-organ damage OR age => 70 years OR two or more specified cardiovascular risk factor
  • BMI =< 45kg/m²
  • age between >= 40 and =< 85 years
  • signed and dated written International Conference of Harmonisation( ICF)
  • stable anti-diabetic background for at least 8 wks before study start

Exclusion criteria

  • Type 1 diabetes
  • Treatment with other antidiabetic drugs (e.g. rosiglitazone, pioglitazone, Glucagon-like peptide 1 (GLP-1) analogue/agonists, Dipeptidyl-peptidase IV (DPP-IV) inhibitors or any insulin) prior to informed consent (previous short term use of insulin (up to two weeks) is allowed if taken at least 8 weeks prior informed consent)
  • treatment with any anti-obesity drug less than 3 months before ICF
  • uncontrolled hyperglycemia
  • previous or planned bariatric surgery or intervention
  • current or planned system corticoid treatment
  • change in thyroid hormones treatment
  • acute liver disease or impaired hepatic function
  • pre-planned coronary artery revascularization within 6 months of ICF
  • known hypersensitivity to any of the components
  • Inappropriateness of glimepiride treatment for renal safety issues according to local prescribing information
  • congestive heart failure class III or IV
  • acute or chronic metabolic acidosis
  • hereditary galactose intolerance
  • alcohol or drug abuse
  • participation in another trail with IMP given 2 months before Investigational Medicinal/Medical Product (IMP) start
  • pre-menopausal women who are nursing or pregnant or of child-bearing potential and not willing to use acceptable method of birth control
  • patients considered reliable by the investigator
  • acute coronary syndrome =< 6 wks before ICF
  • stroke or Transient Ischemic Attack (TIA) =< 3 months prior to ICF

Treatment and study plan

Linagliptin

Drug

linagliptin tablets 5mg QD

Glimepiride

Drug

glimepiride over-encapsulated tablet 1-4 mg QD

linagliptin placebo

Drug

linagliptin placebo

Glimepiride Placebo

Drug

glimepiride placebo

Primary outcomes

  1. The First 3-point Major Adverse Cardiovascular Events (3P-MACE)

    Time frame: From randomization until individual day of trial completion, up to 432 weeks

    The first occurrence of any of the following Clinical Event Committee (CEC) confirmed adjudicated components of the primary composite endpoint: CV death (including fatal stroke and fatal myocardial infarction (MI)), non-fatal MI (excluding silent MI), or nonfatal stroke is presented.

Secondary outcomes

  1. The First 4-point (4P)- MACE

    Time frame: From randomization until individual day of trial completion, up to 432 weeks

    The first key secondary endpoint was time to first occurrence of any of the following adjudicated components of the composite endpoint: CV death (including fatal stroke and fatal MI), non-fatal stroke, non-fatal MI (excluding silent MI), or hospitalisation for unstable angina pectoris.

  2. Percentage of Participants Taking Trial Medication at Trial End, Maintained Glycaemic Control (HbA1c ≤7.0%) Without Need for Rescue Medication, Without >2% Weight Gain, and Without Moderate/Severe Hypoglycaemic Episodes During Maintenance Phase

    Time frame: From Visit 6 (Week 16) to Final visit (Week 432) (Maintenance Phase)

    The second key secondary endpoint was a composite endpoint of treatment sustainability, defined as the percentage of patients taking trial medication at trial end, maintained glycaemic control (HbA1c ≤7.0%) without need for rescue medication, without >2% weight gain, and without moderate/severe hypoglycaemic episodes during maintenance phase.

  3. Percentage of Participants Who Were on Trial Medication at Trial End, Maintained Glycaemic Control (HbA1c ≤7.0%) Without Need for Rescue Medication, and Without >2% Weight Gain During Maintenance Phase

    Time frame: From Visit 6 (Week 16) to Final visit (Week 432) (Maintenance Phase)

    The third key secondary endpoint was a composite endpoint of treatment sustainability, defined as percentage of patients who were on trial medication at trial end, maintained glycaemic control (HbA1c ≤7.0%) without need for rescue medication, and without >2% weight gain during maintenance phase.

  4. Percentage of Participants With the Occurrence of at Least One Event of 3P-MACE

    Time frame: From randomization until individual day of trial completion, up to 432 weeks

    Percentage of participants occurrence of at least one of the following adjudicated components of CV death (including fatal stroke and fatal MI), non-fatal MI (excluding silent MI) and non-fatal stroke is presented as secondary CV endpoint.

  5. Percentage of Participants With the Occurrence of at Least One Event of 4P -MACE

    Time frame: From randomization until individual day of trial completion, up to 432 weeks

    Percentage of participants occurrence of at least one of the following adjudicated components of CV death (including fatal stroke and fatal MI), non-fatal MI (excluding silent MI), non-fatal stroke, and hospitalisation for unstable angina pectoris is presented as secondary CV endpoint.

  6. Percentage of Participants With Occurrence of Any of the Components of the Composite Endpoint of All Adjudication-confirmed Events

    Time frame: From start of the treatment until 7 days after the end of treatment, up to 433 weeks

    Percentage of participants with occurrence of any of the following components of the composite endpoint of all adjudication-confirmed events of:

    • CV death (including fatal stroke and fatal MI)
    • non-fatal MI
    • non-fatal stroke
    • hospitalisation for unstable angina pectoris
    • TIA
    • hospitalisation for heart failure
    • hospitalisation for coronary revascularisation procedures (CABG, PCI)
  7. Time to First Occurrence of Any of the Components of the Composite Endpoint of All Adjudication-confirmed Events

    Time frame: From start of the treatment until 7 days after the end of treatment, up to 433 weeks

    Time to first occurrence of any of the following components of the composite endpoint of all adjudication-confirmed events of:

    • CV death (including fatal stroke and fatal MI)
    • non-fatal MI
    • non-fatal stroke
    • hospitalisation for unstable angina pectoris
    • Transient ischaemic attack (TIA)
    • hospitalisation for heart failure
    • hospitalisation for coronary revascularisation procedures (CABG, PCI)
  8. Change From Baseline to Final Visit in Hemoglobin A1c (HbA1c)

    Time frame: Baseline and week 432

    Change from baseline to final visit in HbA1c is presented as secondary diabetes-related endpoint. Least square mean is adjusted mean. The Final Visit value referred to the last value obtained on-treatment.

  9. Change From Baseline to Final Visit in Fasting Plasma Glucose (FPG)

    Time frame: Baseline and week 432

    Change from baseline to final visit in fasting plasma glucose (FPG) is presented as secondary diabetes-related endpoint. Least square mean is adjusted mean. The Final Visit value referred to the last value obtained on-treatment.

  10. Change From Baseline to Final Visit Fasting Total Cholesterol, Low-density Lipoprotein (LDL) Cholesterol and High-density Lipoprotein (HDL) Cholesterol

    Time frame: Baseline and week 432

    Change from baseline to final visit in total cholesterol, low-density lipoprotein (LDL) cholesterol and high-density lipoprotein (HDL) cholesterol is presented as secondary diabetes-related endpoint. Least square mean is adjusted mean. The Final Visit value referred to the last value obtained on-treatment.

  11. Change From Baseline to Final Visit in Triglycerides

    Time frame: Baseline and week 432

    Change from baseline to final visit in triglycerides is presented as secondary diabetes-related endpoint. Least square mean is adjusted mean. The Final Visit value referred to the last value obtained on-treatment.

  12. Change From Baseline to Final Visit in Creatinine

    Time frame: Baseline and week 432

    Change from baseline to final visit in creatinine is presented as secondary diabetes-related endpoint. Least square mean is adjusted mean. The Final Visit value referred to the last value obtained on-treatment.

  13. Change From Baseline to Final Visit in Estimated Glomerular Filtration Rate (eGFR)

    Time frame: Baseline and week 432

    Change from baseline to final visit in eGFR is presented as secondary diabetes-related endpoint. Least square mean is adjusted mean. The Final Visit value referred to the last value obtained on-treatment.

  14. Change From Baseline to Final Visit in Urine Albumin Creatinine Ratio (UACR)

    Time frame: Baseline and week 432

    Change from baseline to final visit in UACR is presented as secondary diabetes-related endpoint. Least square mean is adjusted geometric mean (gMean) ratio. The Final Visit value referred to the last value obtained on-treatment.

  15. Percentage of Participants With Transition in Albuminuria Classes

    Time frame: Baseline and week 432

    Percentage of patients with transition in albuminuria classes is presented as secondary endpoint. Data for last value on treatment (LVOT) to baseline (base) is presented.

  16. Change From Baseline of Insulin Secretion Rate (ISR) at Fixed Glucose Concentration at 208 Weeks

    Time frame: Baseline and week 208

    The endpoint change from baseline of ISR at fixed glucose concentration at 208 weeks as derived from a 3-hour meal tolerance test is Beta-cell function sub-study endpoint.

  17. Percentage of Participants With Occurrence of Accelerated Cognitive Decline at End of Follow-up

    Time frame: 433 weeks

    Occurrence of accelerated cognitive decline based on regression based index (RBI) score at end of follow-up (a dichotomous outcome measure; presence or absence of accelerated cognitive decline) is Cognition sub-study endpoint.

  18. Continuous Glucose Monitoring (CGM) Sub-study: Change From Baseline in the Inter-quartile Range of Diurnal Glucose Variability (Milligrams/ Deciliter) to End of Study

    Time frame: Baseline

    Baseline data for the continuous glucose monitoring sub-study was collected and analyzed. However, the participant number was far less than original planned. The study was stopped early around week 64 (V9) due to recruitment issues and data were not pre-specified to be analyzed and reported at week 64 time point as target was with an estimated time point of 432 weeks for primary or secondary end points. Thus this endpoint was not analysed and only the baseline data collected were analysed and the results are reported in this CGM substudy endpoint.

  19. CGM Sub-study : Change From Baseline in the Inter-quartile Range of Diurnal Glucose Variability (Millimoles/ Litre) to End of Study

    Time frame: Baseline

    Baseline data for the continuous glucose monitoring sub-study was collected and analyzed. However, the participant number was far less than original planned. The study was stopped early around week 64 (V9) due to recruitment issues and data were not pre-specified to be analyzed and reported at week 64 time point as target was with an estimated time point of 432 weeks for primary or secondary end points. Thus this endpoint was not analysed and only the baseline data collected were analysed and the results are reported in this CGM substudy endpoint.

Sponsors and collaborators

Lead sponsor

Boehringer Ingelheim

Industry

Collaborators

  • Eli Lilly and Company

Registry information

Official study title

A Multicentre, International, Randomised, Parallel Group, Double Blind Study to Evaluate Cardiovascular Safety of Linagliptin Versus Glimepiride in Patients With Type 2 Diabetes Mellitus at High Cardiovascular Risk.

Important dates

Study start
2010
Primary completion
2018
Study completion
2018
First posted
Nov 18, 2010
Registry last updated
Jan 7, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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