1 Year Trial Telmisartan 80 mg Versus Valsartan 160 mg in Hypertensive Type 2 Diabetic Patients With Overt Nephropathy
The general aim of this study is to compare telmisartan 80 mg with valsartan 160 mg in hypertensive patients with type 2 diabetes and overt nephropathy with adjusted blood pressure beyond the target of 130/80 mmHg after one year of treatment.
The primary objective of this study is to show that telmisartan 80 mg is at least as effective (i.e., not inferior) and possibly superior to valsartan 160 mg in reducing 24 hour proteinuria after one year of treatment.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Primary Purpose: Treatment
|Official Title:||A Prospective, Randomised, Double-blind, Double-dummy, Forced-titration, Multicentre, Parallel Group, One Year Treatment Trial to Investigate the Efficacy of Telmisartan 80 mg Versus Valsartan 160 mg in Hypertensive Type 2 Diabetic Patients With Overt Nephropathy|
- Change from baseline (Visit 6) in 24 hour proteinuria, after one year of treatment (study end) with telmisartan 80 mg versus valsartan 160 mg.
- Change from baseline in 24 hour albuminuria, creatinine clearance, estimated GFR, serum creatinine, 24 hour sodium excretion, ADMA, 8-iso-prostaglandin F2a, hs CRP, doubling of serum creatinine, composite of cardiovascular morbidity and mortality.
|Estimated Study Completion Date:||December 2005|
This is a randomised, double-blind, double-dummy, forced titration, multicentre, parallel group trial in patients with essential hypertension, diabetes mellitus type 2 and diabetic nephropathy.
After a 4-6 week Run-in period, patients are randomised to one of the treatment groups and receive either Telmisartan 40 - 80 mg or Valsartan 80 - 160 mg. The treatment regimen is a forced titration with the lower dose given for 2 weeks and the higher dose given for the rest of the treatment period summing up to 52 weeks of treatment. During the treatment period, 8 visits to the investigator are scheduled in order to control blood pressure, renal function parameters and safety. In addition, parameters of endothelial function and oxidative stress are measured at baseline, 6 months and after one year of treatment.
Non-inferiority of telmisartan 80 mg compared to valsartan 160 mg will be tested using the following set of hypotheses:
The overall mean change from baseline in UPER (24 hour urinary protein excretion rate) for telmisartan 80 mg is inferior to that for valsartan 160 mg by 0.5 g/day or more.
The overall mean change from baseline in UPER (24 hour urinary protein excretion rate) for telmisartan 80 mg is less than 0.5 g/day worse than that for valsartan 160 mg.
In order to test the non-inferiority hypothesis, analysis of covariance with treatment and centre as main effects and baseline as a covariate will be performed. Time-to-event data will be analysed using the log-rank test.
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|Study Chair:||Boehringer Ingelheim Study Coordinator||B.I. Pharma GmbH & Co. KG|