Comparison of low-density lipoprotein cholesterol reduction after switching patients on other statins to rosuvastatin or simvastatin in a real-world clinical practice setting.
OBJECTIVE
The study compared low-density lipoprotein cholesterol (LDL-C) reduction obtained after switching patients on a statin therapy to rosuvastatin or simvastatin in real-world clinical practice.


METHODS
Using information from an electronic medical records database, for patients >or=18 years of age who received newly prescribed statin therapy during August 2003 to March 2006, who were switched to either rosuvastatin or simvastatin, and who had LDL-C values at baseline, switch and postswitch data were included (N = 277). Percent LDL-C reduction between patients switched to rosuvastatin (n = 155) and those switched to simvastatin (n = 122) were compared. Linear regression model was adjusted for percent LDL-C change from preswitch to switch, LDL-C at time of switch, age, sex, smoking, statin aggressiveness, and therapy duration postswitch. Percent LDL-C reduction for patients switched from atorvastatin to rosuvastatin versus atorvastatin to simvastatin was also compared.


RESULTS
Patients switched to rosuvastatin or simvastatin were similar in age, sex, and baseline LDL-C (mean, 146 mg/dL). Patients switched to rosuvastatin from any other statin had a significantly greater percent LDL-C reduction (18.4%) postswitch than patients switched to simvastatin (5.8%; P = .0003). After adjusting for baseline covariates, rosuvastatin patients had a significantly greater percent LDL-C reduction postswitch than simvastatin patients (16.0% vs 8.8%, respectively; P = .0002). In the subgroup of patients switched from atorvastatin, patients switched to rosuvastatin (n = 67) had a significantly greater adjusted percent LDL-C reduction (13.6%) postswitch than patients switched to simvastatin (5.5%; n = 75; P = .001).


CONCLUSIONS
Rosuvastatin achieves greater percent LDL-C reduction than simvastatin as a switch therapy in a real-world clinical practice setting. This highlights the need to select the statin to switch to based on additional needed percent LDL-C reduction to meet individual patient targets. Availability of simvastatin (generic statin) and rosuvastatin (branded statin) as treatment options would facilitate efficient and effective management of patients with dyslipidemia.
Fox
Kathleen M
KM
kathyfox@comcast.net
Gandhi
Sanjay K
SK
Ohsfeldt
Robert L
RL
Davidson
Michael H
MH
D000069059:Atorvastatin; D008078:Cholesterol, LDL / Q000097:blood*; D005260:Female; D005464:Fluorobenzenes / Q000627:therapeutic use*; D006538:Heptanoic Acids / Q000627:therapeutic use*; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000627:therapeutic use*; D006937:Hypercholesterolemia / Q000188:drug therapy*; D008297:Male; D016347:Medical Records Systems, Computerized; D011743:Pyrimidines / Q000627:therapeutic use*; D011758:Pyrroles / Q000627:therapeutic use*; D012189:Retrospective Studies; D000068718:Rosuvastatin Calcium; D019821:Simvastatin / Q000627:therapeutic use*; D013449:Sulfonamides / Q000627:therapeutic use*; D016896:Treatment Outcome
D008078:Cholesterol, LDL; D005464:Fluorobenzenes; D006538:Heptanoic Acids; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D011743:Pyrimidines; D011758:Pyrroles; D013449:Sulfonamides; D000068718:Rosuvastatin Calcium; D000069059:Atorvastatin; D019821:Simvastatin