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Rationale, Study Design & Study Population

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Presentation on theme: "Rationale, Study Design & Study Population"— Presentation transcript:

1 Rationale, Study Design & Study Population

2 Rationale

3 Global projections for diabetes (millions)
53.2 64.1 +21% 28.3 40.5 +43% 24.5 44.5 +81% 67.0 99.4 +48% 46.5 80.3 +73% 16.2 32.7 +102% 10.4 18.7 +80% World 2007 = 246 million 2025 = 380 million Increase +55% Diabetes Atlas, 3rd edition, IDF 2006

4 Blood pressure and vascular risk in diabetes Best evidence: 2000
UK Prospective Diabetes Study

5 Blood pressure and vascular risk in diabetes Best evidence: 2000
UKPDS SBP UK Prospective Diabetes Study

6 Preventive therapy in type 2 diabetes: Unresolved issues in 2000
Does standard treatment with fixed combination perindopril/indapamide on top of regular BP control: Produce additional benefits when systolic pressure is lowered below 145 mmHg? Produce similar benefits for hypertensive and non-hypertensive patients? Add to the benefits produced by other cardiovascular preventive therapies including ACE inhibitors ?

7 ADVANCE: a factorial randomised trial of blood pressure lowering and intensive glucose control in 11,140 patients with type 2 diabetes Effects of a fixed combination of the ACE inhibitor, perindopril, and the diuretic, indapamide, on major vascular events

8 Need for type 2 DM patients
What does ADVANCE add? Need for type 2 DM patients In ADVANCE Fixed combination perindopril/indapamide Reduction of CV events on top of current preventive treatments Simple, safe and well tolerated treatment ? Simple, ?

9 Study design

10 Main design features Factorial, randomised trial 11,140 participants
double-blind, placebo-controlled comparison of blood pressure lowering with a fixed combination of perindopril and indapamide open comparison (PROBE design) of a gliclazide MR-based regimen for intensive glucose control 11,140 participants Wide range of geographic regions 4-5 years follow-up Both arms of the trial are fully randomised through a computerised assignment to active treatment or control. Whereas the blood pressure lowering arm is double blind and placebo controlled, the glucose control arm utilises the PROBE design (Prospective, Randomised, Open with Blinded End-points). An independent End-Point Advisory Committee, blinded to all treatment assignments, adjudicates all primary end points and all deaths.

11 ADVANCE BP hypotheses:
Among individuals with type 2 diabetes, the systematic addition of a fixed combination of perindopril and indapamide will reduce the risks of: Major macrovascular disease including coronary disease, cerebrovascular disease or death from cardiovascular disease, and Major microvascular disease including new or worsening nephropathy or diabetic eye disease Irrespective of initial blood pressure or the background use of other preventive therapies, including ACE inhibitors

12 Study design Blood pressure lowering intervention
Registration 6-week run-in phase on active perindopril and indapamide Randomisation Perindopril-indapamide combination + Intensive glucose control Perindopril-indapamide combination + Standard glucose control Placebo + Intensive glucose control Placebo + Standard glucose control End of follow-up (4-5 years) Our original power calculations were based on a total of 10,000 participants with type 2 diabetes, with an annual event rate of 3%, requiring an average follow up of 4.5 years. All participants entered a preliminary 6 week open run-in phase, during which they received one tablet daily of perindopril 2mg – indapamide mg (“Preterax”).

13 Study design Blood glucose lowering intervention
Registration 6-week run-in phase on active perindopril and indapamide Randomisation Perindopril-indapamide combination + Intensive glucose control Perindopril-indapamide combination + Standard glucose control Placebo + Intensive glucose control Placebo + Standard glucose control End of follow-up (4-5 years) Our original power calculations were based on a total of 10,000 participants with type 2 diabetes, with an annual event rate of 3%, requiring an average follow up of 4.5 years. All participants entered a preliminary 6 week open run-in phase, during which they received one tablet daily of perindopril 2mg – indapamide mg (“Preterax”).

14 Inclusion criteria Type 2 diabetes mellitus Age 55 years or older
Additional risk of vascular event Age  65 years History of major macrovascular disease History of major microvascular disease First diagnosis of diabetes >10 years prior to entry Other major risk factor Hypertensive or normotensive

15 Randomised study treatments
Blood pressure lowering Double-blind perindopril-indapamide versus matching placebo 2.0 / 0.625mg or placebo for first 3 months 4.0 / 1.25mg or placebo thereafter Blood glucose lowering (ongoing) Open-label gliclazide MR-based intensive therapy targeting an HbA1c of 6.5% versus usual guideline-based care

16 Randomised study treatments
Blood pressure lowering Double-blind perindopril-indapamide versus matching placebo 2.0 / 0.625mg or placebo for first 3 months 4.0 / 1.25mg or placebo thereafter Blood glucose lowering (ongoing) Open-label gliclazide MR-based intensive therapy targeting an HbA1c of 6.5% versus usual guideline-based care

17 Why fixed combination of perindopril and indapamide ?
Fixed combination of perindopril and indapamide shown to be very effective in: Reducing blood pressure Reducing arterial stiffness in large arteries Enhancing micro-circulation and tissue perfusion in the heart and the kidney Proven CV protection in stroke/TIA patients including in diabetes subgroup (PROGRESS) very well tolerated (PROGRESS) This measure was considered necessary due to the large number of people with diabetes who would be receiving ACE Inhibitors and whose medical practitioners would be reluctant to allow to enter a clinical trial in which they might be randomized to a placebo arm. In the event 47% of all participants received open-label perindopril at the time of randomization and this proportion has remained remarkably constant throughout follow-up.

18 Consistent risk reduction in pre defined subgroups
Strokes Active* Placebo Favors active Favors placebo Hazard ratio (95%CI) Hypertensive Not hypertensive Diabetes No diabetes Cerebral infarction Cerebral hemorrhage TIA/amaurosis Total 0.67 ( ) 0.73 ( ) 0.67 ( ) 0.72 ( ) 0.76 ( ) 0.52 ( ) 0.66 ( ) 0.72 ( ) This slide shows the breakdown of reduction in stroke in hypertensives and normotensives, diabetics, and nondiabetics or per subtype of stroke at the entry. As can be clearly seen that in the PROGRESS study, benefit was seen regardless of the patient’s type. All patients, whatever their blood pressure at entry, benefit from perindopril-based therapy treatment. This suggests the idea that when one is considering the target blood pressure in stroke patients, whatever the level, its too high! (since even normotensive patients who had their BP reduced with perindopril-based therapy were shown to experience clear benefits). * Active treatment: perindopril 4 mg +/- indapamide 2.5 mg (or 2 mg in Japan) 0.5 2.0 Hazard ratio 1.0 Reference: Lancet. 2001;358:

19 Ancillary drug treatment
Blood pressure lowering therapy At discretion of treating physician Only thiazide diuretic contraindicated ACE inhibitor Open-label perindopril (up to 4 mg daily), if indicated All other treatment Except glucose control for those assigned intensive therapy

20 What is a more effective preventive strategy in daily practice?
What does ADVANCE add? What is a more effective preventive strategy in daily practice? Aim for guideline based BP goal OR Aim for guideline based BP goal + standard additition of fixed per/ind combination (like statines post MI)

21 Primary study outcomes
Macrovascular Non-fatal stroke, non-fatal myocardial infarction or death from any cardiovascular cause (including sudden death) Microvascular New of worsening nephropathy or diabetic eye disease Prespecified analyses: Macrovascular and microvascular jointly Macrovascular and microvascular separately

22 Study population

23 Cumulative randomisation
ADVANCE recruitment Cumulative randomisation Regional recruitment 2000 4000 6000 8000 10000 12000 Jul-01 Aug-01 Sep-01 Oct-01 Nov-01 Dec-01 Jan-02 Feb-02 Mar-02 Apr-02 May-02 Jun-02 Jul-02 Aug-02 Sep-02 Oct-02 Nov-02 Dec-02 Jan-03 Feb-03 Mar-03 Apr-03 Number of patients randomised Region Number ANZ / Asia 2,328 Canada China 3,293 Continental Europe 2,879 Northern Europe 2,204 TOTAL ,140 Registered 12,877 Randomised 11,140 The first study participant was randomised in July 2001 and recruitment of 11,140 randomised participants was completed in March At the outset 4 regions of approximately 2500 participants were planned, but subsequently Canada joined the study as a smaller region that was managed separately though a Regional Coordinating Centre in Montreal.

24 Withdrawals during run-in
Reason for withdrawal N % of registered patients (N=12877) Patient ineligible 394 3.1% Patient wishes 391 3.0% Poor compliance with study drug 269 2.1% Cough 238 1.8% Hypotension 99 0.8% Other suspected intolerance to study drug 133 1.0% Other reasons 213 1.7% TOTAL 1737 13.5%

25 Blood pressure, other risk factors, ancillary treatment

26 Baseline characteristics
Randomised treatment Active (n=5569) Placebo (n=5571) Age (years) 66 Systolic blood pressure (mmHg) 145 Diastolic blood pressure (mmHg) 81 Haemoglobin A1c (%) 7.5 History of macrovascular disease 32% History of microvascular disease 10% Microalbuminuria 26%

27 Blood pressure reduction
165 Placebo 140.3 mmHg 134.7 mmHg Average BP during follow-up 77.0 mmHg 74.8 mmHg Perindopril-Indapamide 155 145 137 81 78 145 Systolic 135 Δ 5.6 mmHg (95% CI ); p<0.001 125 Mean Blood Pressure (mmHg) 115 105 95 85 Diastolic 75 Δ 2.2 mmHg (95% CI ); p<0.001 65 R 6 12 18 24 30 36 42 48 54 60 Follow-up (Months)

28 Conclusion Aim for guideline based BP goal +
standard additition of fixed per/ind combination (like statines post MI) Is a more effective BP lowering strategy than Aim for guideline based BP goal

29 ADVANCE BP reduction in context: UK Prospective Diabetes Study
UKPDS SBP UK Prospective Diabetes Study

30 Risk factors levels At end of follow-up
Parameter Randomised treatment Active (n=5569) Placebo (n=5571) Systolic BP (mmHg) 135.6 139.9 Diastolic BP (mmHg) 73.6 75.1 Haemoglobin A1c (%) 6.9 Total cholesterol (mmol/L) * 4.7 4.6 HDL cholesterol (mmol/L) * 1.3 LDL cholesterol (mmol/L) * 2.7 2.6 Triglycerides (mmol/L) * 1.8 1.7 * Measurements taken at month 48

31 Baseline characteristics Cardiovascular and diabetes drugs
Randomised treatment Active (n=5569) Placebo (n=5571) Any blood pressure lowering drug 75% ACE inhibitor* ARB 43% 5% 6% Oral hypoglycaemic drugs 91% Statin 28% 29% Other lipid modifying drug 9% 8% Aspirin 44% Other antiplatelet drugs 4% *By end of run-in period: 47% were receiving open label perindopril

32 Ancillary drug therapy
Ancillary drug therapy At end of follow-up ADVANCE results will be underestimation of real effect fixed per/ind combination Randomised treatment Active (n=5569) Placebo (n=5571) Any BP lowering drug 74% 83% ACE inhibitor ARB 50% 10% 60% 13% Oral hypoglycaemic drugs 90% 91% Insulin 33% 30% Statin 44% 45% Other lipid modifying drug 8% 7% Aspirin 56% 55% Other antiplatelet drugs 6%

33 Study population Broad cross-section of diabetic patients:
Europe, North America, Asia-Pacific With and without history of vascular disease hypertension Other risk factors Wide range of background treatments including ACE inhibitor/other BP lowering drugs for many Breadth should ensure results are relevant to clinical practice worldwide

34 ADVANCE substudies ADVANCE echocardiography substudy
ADVANCE retinopathy measurements substudy (AdRem) ADVANCE cost effective and quality of life substudy (CEQol) ADVANCE genetics substudy (Prognomix)


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