Dose-ranging study:
A multicenter, randomized, double-blind, placebo-controlled, dose-ranging study was performed to evaluate the efficacy of pitavastatin compared with placebo in 251 patients with primary hyperlipidemia (Table 4). Pitavastatin, given as a single daily dose for 12 weeks, significantly reduced plasma LDL-C, TC, TG, and Apo-B compared to placebo and was associated with variable increases in HDL-C across the dose range.
Table 4 Dose-Response in Patients with Primary Hypercholesterolemia (Adjusted Mean % Change from Baseline at Week 12) |
Treatment
| N
| LDL-C
| Apo-B
| TC
| TG
| HDL-C
|
Placebo
| 53
| -3
| -2
| -2
| 1
| 0
|
Pitavastatin 1 mg
| 52
| -32
| -25
| -23
| -15
| 8
|
Pitavastatin 2 mg
| 49
| -36
| -30
| -26
| -19
| 7
|
Pitavastatin 4 mg
| 51#
| -43
| -35
| -31
| -18
| 5
|
Active-controlled study with atorvastatin (NK-104-301)
Pitavastatin was compared with the HMG-CoA reductase inhibitor atorvastatin in a randomized, multicenter, double-blind, double-dummy, active-controlled, non-inferiority Phase 3 study of 817 patients with primary hyperlipidemia or mixed dyslipidemia. Patients entered a 6 to 8 week wash-out/dietary lead-in period and then were randomized to a 12 week treatment with either pitavastatin or atorvastatin (Table 5). Non-inferiority of pitavastatin to a given dose of atorvastatin was considered to be demonstrated if the lower bound of the 95% CI for the mean treatment difference was greater than -6% for the mean percent change in LDL-C.
Lipid results are shown in Table 5. For the percent change from baseline to endpoint in LDL-C, pitavastatin was non-inferior to atorvastatin for the two pairwise comparisons: pitavastatin 2 mg vs. atorvastatin 10 mg and pitavastatin 4 mg vs. atorvastatin 20 mg. Mean treatment differences (95% CI) were 0% (-3%, 3%) and 1% (-2%, 4%), respectively.
Table 5 Response by Dose of Pitavastatin and Atorvastatin in Patients with Primary Hyperlipidemia or Mixed Dyslipidemia (Mean % Change from Baseline at Week 12) Treatment
| N
| LDL-C
| Apo-B
| TC
| TG
| HDL-C
| non-HDL-C
|
Pitavastatin 2 mg daily
| 315
| -38
| -30
| -28
| -14
| 4
| -35
|
Pitavastatin 4 mg daily
| 298
| -45
| -35
| -32
| -19
| 5
| -41
|
Atorvastatin 10 mg daily
| 102
| -38
| -29
| -28
| -18
| 3
| -35
|
Atorvastatin 20 mg daily
| 102
| -44
| -36
| -33
| -22
| 2
| -41
|
Atorvastatin 40 mg daily
| -----------------------------------------Not Studied------------------------------------
|
Atorvastatin 80 mg daily
| -----------------------------------------Not Studied------------------------------------
|
Active-controlled study with simvastatin (NK-104-302)
Pitavastatin was compared with the HMG-CoA reductase inhibitor simvastatin in a randomized, multicenter, double-blind, double-dummy, active-controlled, non-inferiority Phase 3 study of 843 patients with primary hyperlipidemia or mixed dyslipidemia. Patients entered a 6 to 8 week wash-out/dietary lead-in period and then were randomized to a 12 week treatment with either pitavastatin or simvastatin (Table 6). Non-inferiority of pitavastatin to a given dose of simvastatin was considered to be demonstrated if the lower bound of the 95% CI for the mean treatment difference was greater than -6% for the mean percent change in LDL-C.
Lipid results are shown in Table 6. For the percent change from baseline to endpoint in LDL-C, pitavastatin was non-inferior to simvastatin for the two pairwise comparisons: pitavastatin 2 mg vs. simvastatin 20 mg and pitavastatin 4 mg vs. simvastatin 40 mg. Mean treatment differences (95% CI) were 4% (1%, 7%) and 1% (-2%, 4%), respectively.
Table 6 Response by Dose of Pitavastatin and Simvastatin in Patients with Primary Hyperlipidemia or Mixed Dyslipidemia (Mean % Change from Baseline at Week 12) Treatment
| N
| LDL-C
| Apo-B
| TC
| TG
| HDL-C
| non-HDL-C
|
Pitavastatin 2 mg daily
| 307
| -39
| -30
| -28
| -16
| 6
| -36
|
Pitavastatin 4 mg daily
| 319
| -44
| -35
| -32
| -17
| 6
| -41
|
Simvastatin 20 mg daily
| 107
| -35
| -27
| -25
| -16
| 6
| -32
|
Simvastatin 40 mg daily
| 110
| -43
| -34
| -31
| -16
| 7
| -39
|
Simvastatin 80 mg daily
| -----------------------------------------Not Studied------------------------------------
|
Active-controlled study with pravastatin in elderly (NK-104-306)
Pitavastatin was compared with the HMG-CoA reductase inhibitor pravastatin in a randomized, multicenter, double-blind, double-dummy, parallel group, active-controlled non-inferiority Phase 3 study of 942 elderly patients (≥ 65 years) with primary hyperlipidemia or mixed dyslipidemia. Patients entered a 6 to 8 week wash out/dietary lead-in period, and then were randomized to a once daily dose of pitavastatin or pravastatin for 12 weeks (Table 7). Non-inferiority of pitavastatin to a given dose of pravastatin was assumed if the lower bound of the 95% CI for the treatment difference was greater than -6% for the mean percent change in LDL-C.
Lipid results are shown in Table 7. Pitavastatin significantly reduced LDL-C compared to pravastatin as demonstrated by the following pairwise dose comparisons: pitavastatin 1 mg vs. pravastatin 10 mg, pitavastatin 2 mg vs. pravastatin 20 mg and pitavastatin 4 mg vs. pravastatin 40 mg. Mean treatment differences (95% CI) were 9% (6%, 12%), 10% (7%, 13%) and 10% (7%, 13% ), respectively.
Table 7 Response by Dose of Pitavastatin and Pravastatin in Patients with Primary Hyperlipidemia or Mixed Dyslipidemia (Mean % Change from Baseline at Week 12) Treatment
| N
| LDL-C
| Apo-B
| TC
| TG
| HDL-C
| non-HDL-C
|
Pitavastatin 1 mg daily
| 207
| -31
| -25
| -22
| -13
| 1
| -29
|
Pitavastatin 2 mg daily
| 224
| -39
| -31
| -27
| -15
| 2
| -36
|
Pitavastatin 4 mg daily
| 210
| -44
| -37
| -31
| -22
| 4
| -41
|
Pravastatin 10 mg daily
| 103
| -22
| -17
| -15
| -5
| 0
| -20
|
Pravastatin 20 mg daily
| 96
| -29
| -22
| -21
| -11
| -1
| -27
|
Pravastatin 40 mg daily
| 102
| -34
| -28
| -24
| -15
| 1
| -32
|
Pravastatin 80 mg daily
| --------------------------------------Not Studied--------------------------------
|
Active-controlled study with simvastatin in patients with ≥ 2 risk factors for coronary heart disease (NK-104-304)
Pitavastatin was compared with the HMG-CoA reductase inhibitor simvastatin in a randomized, multicenter, double-blind, double-dummy, active-controlled, non-inferiority Phase 3 study of 351 patients with primary hyperlipidemia or mixed dyslipidemia with ≥ 2 risk factors for coronary heart disease. After a 6 to 8 week wash-out/dietary lead-in period, patients were randomized to a 12 week treatment with either pitavastatin or simvastatin (Table 8). Non-inferiority of pitavastatin to simvastatin was considered to be demonstrated if the lower bound of the 95% CI for the mean treatment difference was greater than -6% for the mean percent change in LDL-C.
Lipid results are shown in Table 8. Pitavastatin 4 mg was non-inferior to simvastatin 40 mg for percent change from baseline to endpoint in LDL-C. The mean treatment difference (95% CI) was 0% (-2%, 3%).
Table 8 Response by Dose of Pitavastatin and Simvastatin in Patients with Primary Hyperlipidemia or Mixed Dyslipidemia with ≥ 2 Risk Factors for Coronary Heart Disease (Mean % Change from Baseline at Week 12) Treatment
| N
| LDL-C
| Apo-B
| TC
| TG
| HDL-C
| non-HDL-C
|
Pitavastatin 4 mg daily
| 233
| -44
| -34
| -31
| -20
| 7
| -40
|
Simvastatin 40 mg daily
| 118
| -44
| -34
| -31
| -15
| 5
| -39
|
Simvastatin 80 mg daily
| -------------------------------------------Not Studied--------------------------------
|
Active-controlled study with atorvastatin in patients with type II diabetes mellitus (NK-104-305)
Pitavastatin was compared with the HMG-CoA reductase inhibitor atorvastatin in a randomized, multicenter, double-blind, double-dummy, parallel group, active-controlled, non-inferiority Phase 3 study of 410 subjects with type II diabetes mellitus and combined dyslipidemia. Patients entered a 6 to 8 week washout/dietary lead-in period and were randomized to a once daily dose of pitavastatin or atorvastatin for 12 weeks. Non-inferiority of pitavastatin was considered to be demonstrated if the lower bound of the 95% CI for the mean treatment difference was greater than -6% for the mean percent change in LDL-C.
Lipid results are shown in Table 9. The treatment difference (95% CI) for LDL-C percent change from baseline was -2% (-6.2%, 1.5%). The two treatment groups were not statistically different on LDL-C. However, the lower limit of the CI was -6.2%, slightly exceeding the -6% non-inferiority limit so that the non-inferiority objective was not achieved.
Table 9 Response by Dose of Pitavastatin and Atorvastatin in Patients with Type II Diabetes Mellitus and Combined Dyslipidemia (Mean % Change from Baseline at Week 12) Treatment
| N
| LDL-C
| Apo-B
| TC
| TG
| HDL-C
| non-HDL-C
|
Pitavastatin 4 mg daily
| 274
| -41
| -32
| -28
| -20
| 7
| -36
|
Atorvastatin 20 mg daily
| 136
| -43
| -34
| -32
| -27
| 8
| -40
|
Atorvastatin 40 mg daily
| -----------------------------------Not Studied------------------------------------------
|
Atorvastatin 80 mg daily
| -----------------------------------Not Studied------------------------------------------
|
The treatment differences in efficacy in LDL-C change from baseline between Pitavastatin and active controls in the Phase 3 studies are summarized in Figure 1.
Figure 1 Treatment Difference in Adjusted Mean Percent Change in LDL-C
NL=non-inferiority limit.