Diabetic Retinopathy Candesartan Trials (DIRECT)
The primary objective is to determine whether candesartan, compared to placebo reduces the incidence of diabetic retinopathy in normotensive, normoalbuminuric type 1 diabetic patients without retinopathy.
The secondary objective is to determine whether candesartan, compared to placebo, beneficially influences the rate of change in urinary albumin excretion rate (UAER).
This study is part of the DIRECT Programme also including secondary prevention studies of diabetic retinopathy in both type 1 and type 2 diabetes. The primary objective for all three pooled studies is to determine whether candesartan, compared to placebo, reduces the incidence of microalbuminuria in type 1 and type 2 diabetic patients.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||Effects of Candesartan Cilexetil (Candesartan) on Diabetic Retinopathy in Type 1 Diabetic Patients Without Retinopathy.|
- Number of Participants With a 2-step or Greater Increase in Early Treatment Diabetic Retinopathy Study (ETDRS) Severity Scale. [ Time Frame: From baseline to end of study, i.e. 5 years, with visits after a half year, one year and thereafter one visit per year. ]Two steps were defined as either a 1-step change in each eye or as a 2-step change in one eye only. ETDRS is a scale with 11 steps (1-11, where a score of 1 represents no retinopathy and a score of 11 represents proliferative retinopathy). A generalized log-rank test was used to test difference between treatments.
- Rate of Change in Urinary Albumin Excretion Rate (UAER). [ Time Frame: From baseline to end of study, i.e. 5 years. ]An estimate of the slope from fitting a linear regression of log(UAER) over time for each patient.
|Study Start Date:||June 2001|
|Study Completion Date:||April 2008|
|Primary Completion Date:||April 2008 (Final data collection date for primary outcome measure)|
No Intervention: 1
Drug: candesartan cilexetil
32 mg once daily oral tablet given over 60 months
Other Name: ATACAND
Please refer to this study by its ClinicalTrials.gov identifier: NCT00252733
|Study Director:||AstraZeneca Atacand Medical Science Director, MD||AstraZeneca|