A meta-analysis of randomized head-to-head trials for effects of rosuvastatin versus atorvastatin on apolipoprotein profiles.

To determine which statin will better improve the apolipoprotein (Apo) profiles (ApoA-I levels, ApoB levels, and ApoB/A-I ratios), we performed a meta-analysis of randomized head-to-head trials of rosuvastatin versus atorvastatin therapy. MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials were searched through December 2012 using Web-based search engines (PubMed and OVID). The search terms included "apolipoprotein," "rosuvastatin," "atorvastatin," "randomized," "randomly," and "randomization." Of 42 potentially relevant studies initially screened, 25 reports of randomized trials enrolling 14,283 patients were included. A pooled analysis for the percentage of changes in ApoA-I demonstrated a benefit of rosuvastatin versus atorvastatin in the comparison of all rosuvastatin/atorvastatin dose ratios (mean difference 2.97%, 3.39%, 5.77%, and 6.25%). For the percentage of changes in ApoB, a benefit was seen for rosuvastatin versus atorvastatin in the 1/1 (-6.06%) and 1/2 dose ratio (-1.80%). However, a benefit was seen for atorvastatin versus rosuvastatin in the 1/4 (2.38%) and 1/8 dose ratio (6.59%). The pooled analysis for the percentage of changes in the Apo B/A-I ratios demonstrated a benefit for rosuvastatin versus atorvastatin in the 1/1 (-7.22%) and 1/2 dose ratio (-3.51%), with no difference in the 1/4 dose ratio. In contrast, a benefit was seen for atorvastatin versus rosuvastatin in the 1/8 dose ratio (4.03%). In conclusion, rosuvastatin might increase Apo A-I levels at all dose ratios and decrease ApoB levels and ApoB/A-I ratios in the 1/1 and 1/2 dose ratio versus atorvastatin. Only higher dose atorvastatin appeared to be more effective for the reduction in ApoB levels (1/4 and 1/8 dose ratio) and Apo B/A-I ratios (1/8 dose ratio).