Study of Heart and Renal Protection (SHARP)
Kidney Disease, Chronic
About this trial
This is an interventional prevention trial for Kidney Disease, Chronic focused on measuring Kidney Disease, Chronic, LDL cholesterol, simvastatin, ezetimibe, cardiovascular disease, atherosclerosis
Eligibility Criteria
Inclusion Criteria: History of chronic kidney disease (CKD): either patients who are pre-dialysis (with a plasma or serum creatinine greater than or equal to 150 micromol/l [greater than or equal to 1.7 mg/dl] in men, or greater than or equal to 130 micromol/l [greater than or equal to 1.5 mg/dl] in women); or patients on dialysis (hemodialysis or peritoneal dialysis) Men or women aged greater than or equal to 40 years Exclusion Criteria: Definite history of myocardial infarction or coronary revascularization procedure Functioning renal transplant, or living donor-related transplant planned Less than 2 months since presentation as an acute uraemic emergency (but could be entered later, if appropriate) Definite history of chronic liver disease, or abnormal liver function (i.e. alanine aminotransferase [ALT] greater than 1.5 x upper limit of normal [ULN] or, if ALT not available, aspartate aminotransferase [AST] greater than 1.5 x ULN). (Note: Patients with a history of hepatitis were eligible provided these limits were not exceeded.) Evidence of active inflammatory muscle disease (e.g. dermatomyositis, polymyositis), or creatine kinase (CK) greater than 3 x ULN Definite previous adverse reaction to a statin or to ezetimibe Concurrent treatment with a contraindicated drug. (Note: Patients who were temporarily taking such drugs could have been re-screened for participation in the study when they discontinued them, if appropriate.) These contraindicated drugs included: HMG-CoA reductase inhibitor ("statin"); fibric acid derivative ("fibrate"); nicotinic acid; macrolide antibiotic (erythromycin, clarithromycin); systemic use of imidazole or triazole antifungals (e.g. itraconazole, ketoconazole); protease-inhibitors (e.g. antiretroviral drugs for HIV infection); nefazodone; ciclosporin Child-bearing potential (i.e. premenopausal woman who was not using a reliable method of contraception) Known to be poorly compliant with clinic visits or prescribed medication Medical history that might have limited the individual's ability to take trial treatments for the duration of the study (e.g. severe respiratory disease, history of cancer other than non-melanoma skin cancer, or recent history of alcohol or substance misuse)
Sites / Locations
- Clinical Trial Service Unit & Epidemiological Studies Unit, University of Oxford
Arms of the Study
Arm 1
Arm 2
Arm 3
Placebo Comparator
Active Comparator
Other
Placebo
Simvastatin 20mg plus Ezetimibe 10mg
Simvastatin 20mg
Placebo = Arm 1. A double-dummy method ensured that patients and study staff were unaware of the treatment allocation, with all Arm 1 patients taking 2 tablets (placebo simvastatin plus ezetimibe tablet with a placebo simvastatin tablet) during the first year. After the first year, all Arm 1 patients took one tablet (placebo simvastatin plus ezetimibe tablet).
Simvastatin 20mg plus ezetimibe 10mg = Arm 2. A double-dummy method ensured that patients and study staff were unaware of the treatment allocation, with all Arm 2 patients taking 2 tablets during the first year (active simvastatin plus ezetimibe tablet with a placebo simvastatin tablet). After the first year, all Arm 2 patients took one tablet (active simvastatin 20mg plus ezetimibe 10mg tablet).
Simvastatin 20mg alone = Arm 3. After 1 year, those initially allocated to Arm 3 were re-randomized to simvastatin 20mg plus ezetimibe 10mg (Arm 3b) daily or placebo (Arm 3a). A double-dummy method ensured that patients and study staff were unaware of the treatment allocation, with Arm 3 patients taking 2 tablets (a placebo simvastatin plus ezetimibe tablet with an active simvastatin tablet) during the first year. After the first year, all Arm 3a and Arm 3b patients took one tablet (active or placebo simvastatin plus ezetimibe tablet).