Abstract
Background:Rosuvastatin is an effective treatment for patients with hypercholesterolaemia. However, the incremental benefit and risk of increasing through the licensed dose range have not been comprehensively assessed across all available clinical trials.Research design and methods:The literature databases CENTRAL, EMBASE, and MEDLINE were searched in April 2008 for trials with comparisons of sequential licensed rosuvastatin dosages: 5 vs. 10 mg/day, 10 vs. 20 mg/day, and 20 vs. 40 mg/day. Clinical trial registries were also searched. For benefit outcomes, weighted mean differences were derived using the inverse variance method. For risk outcomes, the Mantel–Haenszel method was used to calculate a summary relative risk.Results:The meta-analysis included 26 trials. The results demonstrated significantly favourable changes in low-density lipoprotein cholesterol level with increasing dosage (by 6.25, 5.84, and 5.03 percentage points for 10 vs. 5 mg/day, 20 vs. 10 mg/day, and 40 vs. 20 mg/day, respectively), and also in the ratios of total cholesterol to high-density lipoprotein cholesterol (HDL-C) and apolipoprotein B to apolipoprotein A-I (all p < 0.00001). In addition, a significantly favourable change in HDL-C level was found with 20 mg/day over 10 mg/day (p = 0.02). Among the primary tolerability comparisons, no significant differences in risk were seen for muscular, hepatic, or renal adverse events, with only one exception: the risk of proteinuria by urine dipstick testing was significantly higher with rosuvastatin 40 mg/day than 20 mg/day (p = 0.01).The efficacy outcomes assessed in this meta-analysis are limited to surrogate markers of morbidity and mortality.Conclusions:This meta-analysis provides evidence for improved efficacy in treating patients with hypercholesterolaemia with each sequential titration of rosuvastatin and a generally consistent tolerability profile across the dose range.
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