In the Anglo-Scandinavian Cardiac Outcomes Trial (ASCOT), the
effect of LIPITOR on fatal and non-fatal coronary heart disease was assessed in
10,305 hypertensive patients 40–80 years of age (mean of 63 years), without a
previous myocardial infarction and with TC levels <251 mg/dL (6.5 mmol/L).
Additionally, all patients had at least 3 of the following cardiovascular risk
factors: male gender (81.1%), age >55 years (84.5%), smoking (33.2%),
diabetes (24.3%), history of CHD in a first-degree relative (26%), TC:HDL >6
(14.3%), peripheral vascular disease (5.1%), left ventricular hypertrophy
(14.4%), prior cerebrovascular event (9.8%), specific ECG abnormality (14.3%),
proteinuria/albuminuria (62.4%). In this double-blind, placebo-controlled study,
patients were treated with anti-hypertensive therapy (Goal BP <140/90 mm Hg
for non-diabetic patients; <130/80 mm Hg for diabetic patients) and allocated
to either LIPITOR 10 mg daily (n=5168) or placebo (n=5137), using a covariate
adaptive method which took into account the distribution of nine baseline
characteristics of patients already enrolled and minimized the imbalance of
those characteristics across the groups. Patients were followed for a median
duration of 3.3 years.
The effect of 10 mg/day of LIPITOR on lipid levels was similar to that seen
in previous clinical trials.
LIPITOR significantly reduced the rate of coronary events [either fatal
coronary heart disease (46 events in the placebo group vs. 40 events in the
LIPITOR group) or non-fatal MI (108 events in the placebo group vs. 60 events in
the LIPITOR group)] with a relative risk reduction of 36% [(based on incidences
of 1.9% for LIPITOR vs. 3.0% for placebo), p=0.0005 (see Figure 1)]. The risk reduction was consistent regardless of
age, smoking status, obesity, or presence of renal dysfunction. The effect of
LIPITOR was seen regardless of baseline LDL levels. Due to the small number of
events, results for women were inconclusive.
Figure 1: Effect of LIPITOR 10 mg/day on Cumulative
Incidence of Non-Fatal Myocardial Infarction or Coronary Heart Disease Death (in
ASCOT-LLA)
LIPITOR also significantly decreased the relative risk for revascularization
procedures by 42%. Although the reduction of fatal and non-fatal strokes did not
reach a pre-defined significance level (p=0.01), a favorable trend was observed
with a 26% relative risk reduction (incidences of 1.7% for LIPITOR and 2.3% for
placebo). There was no significant difference between the treatment groups for
death due to cardiovascular causes (p=0.51) or noncardiovascular causes
(p=0.17).
In the Collaborative Atorvastatin Diabetes Study (CARDS), the effect of
LIPITOR on cardiovascular disease (CVD) endpoints was assessed in 2838 subjects
(94% white, 68% male), ages 40–75 with type 2 diabetes based on WHO criteria,
without prior history of cardiovascular disease and with LDL < 160 mg/dL and TG < 600 mg/dL. In addition to diabetes, subjects had 1 or more of the following
risk factors: current smoking (23%), hypertension (80%), retinopathy (30%), or
microalbuminuria (9%) or macroalbuminuria (3%). No subjects on hemodialysis were
enrolled in the study. In this multicenter, placebo-controlled, double-blind
clinical trial, subjects were randomly allocated to either LIPITOR 10 mg daily
(1429) or placebo (1411) in a 1:1 ratio and were followed for a median duration
of 3.9 years. The primary endpoint was the occurrence of any of the major
cardiovascular events: myocardial infarction, acute CHD death, unstable angina,
coronary revascularization, or stroke. The primary analysis was the time to
first occurrence of the primary endpoint.
Baseline characteristics of subjects were: mean age of 62 years, mean
HbA1c 7.7%; median LDL-C 120 mg/dL; median TC 207 mg/dL;
median TG 151 mg/dL; median HDL-C 52 mg/dL.
The effect of LIPITOR 10 mg/day on lipid levels was similar to that seen in
previous clinical trials.
LIPITOR significantly reduced the rate of major cardiovascular events
(primary endpoint events) (83 events in the LIPITOR group vs. 127 events in the
placebo group) with a relative risk reduction of 37%, HR 0.63, 95% CI (0.48,
0.83) (p=0.001) (see Figure 2). An effect of LIPITOR was
seen regardless of age, sex, or baseline lipid levels.
LIPITOR significantly reduced the risk of stroke by 48% (21 events in the
LIPITOR group vs. 39 events in the placebo group), HR 0.52, 95% CI (0.31, 0.89)
(p=0.016) and reduced the risk of MI by 42% (38 events in the LIPITOR group vs.
64 events in the placebo group), HR 0.58, 95.1% CI (0.39, 0.86) (p=0.007). There
was no significant difference between the treatment groups for angina,
revascularization procedures, and acute CHD death.
There were 61 deaths in the LIPITOR group vs. 82 deaths in the placebo group
(HR 0.73, p=0.059).
Figure 2: Effect of LIPITOR 10 mg/day on Time to Occurrence
of Major Cardiovascular Event (myocardial infarction, acute CHD death, unstable
angina, coronary revascularization, or stroke) in CARDS
In the Treating to New Targets Study (TNT), the effect of LIPITOR 80 mg/day
vs. LIPITOR 10 mg/day on the reduction in cardiovascular events was assessed in
10,001 subjects (94% white, 81% male, 38% >65 years) with clinically evident
coronary heart disease who had achieved a target LDL-C level <130 mg/dL after
completing an 8-week, open-label, run-in period with LIPITOR 10 mg/day. Subjects
were randomly assigned to either 10 mg/day or 80 mg/day of LIPITOR and followed
for a median duration of 4.9 years. The primary endpoint was the time-to-first
occurrence of any of the following major cardiovascular events (MCVE): death due
to CHD, non-fatal myocardial infarction, resuscitated cardiac arrest, and fatal
and non-fatal stroke. The mean LDL-C, TC, TG, non-HDL, and HDL cholesterol
levels at 12 weeks were 73, 145, 128, 98, and 47 mg/dL during treatment with 80
mg of LIPITOR and 99, 177, 152, 129, and 48 mg/dL during treatment with 10 mg of
LIPITOR.
Treatment with LIPITOR 80 mg/day significantly reduced the rate of MCVE (434
events in the 80 mg/day group vs. 548 events in the 10 mg/day group) with a
relative risk reduction of 22%, HR 0.78, 95% CI (0.69, 0.89), p=0.0002 (see Figure 3 and Table 5). The overall
risk reduction was consistent regardless of age (<65, >65) or gender.
Figure 3: Effect of LIPITOR 80 mg/day vs. 10 mg/day on Time
to Occurrence of Major Cardiovascular Events (TNT)
TABLE 5. Overview of Efficacy Results in TNT| Endpoint | Atorvastatin 10 mg (N=5006) | Atorvastatin 80 mg (N=4995) | HR* (95%CI) |
|---|
| PRIMARY ENDPOINT | n | (%) | n | (%) |
|
| First major cardiovascular endpoint | 548 | (10.9) | 434 | (8.7) | 0.78 (0.69, 0.89) |
| Components of the Primary
Endpoint |
|
|
|
|
|
| CHD death | 127 | (2.5) | 101 | (2.0) | 0.80 (0.61, 1.03) |
| Non-fatal, non-procedure related MI | 308 | (6.2) | 243 | (4.9) | 0.78 (0.66, 0.93) |
| Resuscitated cardiac arrest | 26 | (0.5) | 25 | (0.5) | 0.96 (0.56, 1.67) |
| Stroke (fatal and non-fatal) | 155 | (3.1) | 117 | (2.3) | 0.75 (0.59, 0.96) |
| SECONDARY ENDPOINTS† |
|
|
|
|
|
| First CHF with hospitalization | 164 | (3.3) | 122 | (2.4) | 0.74 (0.59, 0.94) |
| First PVD endpoint | 282 | (5.6) | 275 | (5.5) | 0.97 (0.83, 1.15) |
| First CABG or other coronary revascularization
procedure‡ | 904 | (18.1) | 667 | (13.4) | 0.72 (0.65, 0.80) |
| First documented angina endpoint‡ | 615 | (12.3) | 545 | (10.9) | 0.88 (0.79, 0.99) |
| All-cause mortality | 282 | (5.6) | 284 | (5.7) | 1.01 (0.85, 1.19) |
| Components of All-Cause
Mortality |
|
|
|
|
|
| Cardiovascular death | 155 | (3.1) | 126 | (2.5) | 0.81 (0.64, 1.03) |
| Noncardiovascular death | 127 | (2.5) | 158 | (3.2) | 1.25 (0.99, 1.57) |
| Cancer death | 75 | (1.5) | 85 | (1.7) | 1.13 (0.83, 1.55) |
| Other non-CV death | 43 | (0.9) | 58 | (1.2) | 1.35 (0.91, 2.00) |
| Suicide, homicide, and other traumatic
non-CV death | 9 | (0.2) | 15 | (0.3) | 1.67 (0.73, 3.82) |
HR=hazard ratio; CHD=coronary heart disease; CI=confidence interval; MI=myocardial infarction; CHF=congestive heart failure; CV=cardiovascular; PVD=peripheral vascular disease; CABG=coronary artery bypass graft
Confidence invervals for the Secondary Endpoints were not adjusted for multiple comparisons
*Atorvastatin 80 mg: atorvastatin 10 mg
†Secondary endpoints not included in primary endpoint
‡Component of other secondary endpoints
Of the events that comprised the primary efficacy endpoint, treatment with
LIPITOR 80 mg/day significantly reduced the rate of non-fatal, non-procedure
related MI and fatal and non-fatal stroke, but not CHD death or resuscitated
cardiac arrest (Table 5). Of the predefined secondary endpoints, treatment with
LIPITOR 80 mg/day significantly reduced the rate of coronary revascularization,
angina, and hospitalization for heart failure, but not peripheral vascular
disease. The reduction in the rate of CHF with hospitalization was only observed
in the 8% of patients with a prior history of CHF.
There was no significant difference between the treatment groups for
all-cause mortality (Table 5). The proportions of subjects who experienced
cardiovascular death, including the components of CHD death and fatal stroke,
were numerically smaller in the LIPITOR 80 mg group than in the LIPITOR 10 mg
treatment group. The proportions of subjects who experienced noncardiovascular
death were numerically larger in the LIPITOR 80 mg group than in the LIPITOR 10
mg treatment group.
In the Incremental Decrease in Endpoints Through Aggressive Lipid Lowering
Study (IDEAL), treatment with LIPITOR 80 mg/day was compared to treatment with
simvastatin 20–40 mg/day in 8,888 subjects up to 80 years of age with a history
of CHD to assess whether reduction in CV risk could be achieved. Patients were
mainly male (81%), white (99%) with an average age of 61.7 years, and an average
LDL-C of 121.5 mg/dL at randomization; 76% were on statin therapy. In this
prospective, randomized, open-label, blinded endpoint (PROBE) trial with no
run-in period, subjects were followed for a median duration of 4.8 years. The
mean LDL-C, TC, TG, HDL, and non-HDL cholesterol levels at Week 12 were 78, 145,
115, 45, and 100 mg/dL during treatment with 80 mg of LIPITOR and 105, 179, 142,
47, and 132 mg/dL during treatment with 20–40 mg of simvastatin.
There was no significant difference between the treatment groups for the
primary endpoint, the rate of first major coronary event (fatal CHD, non-fatal
MI, and resuscitated cardiac arrest): 411 (9.3%) in the LIPITOR 80 mg/day group
vs. 463 (10.4%) in the simvastatin 20–40 mg/day group, HR 0.89, 95% CI ( 0.78,
1.01), p=0.07.
There were no significant differences between the treatment groups for
all-cause mortality: 366 (8.2%) in the LIPITOR 80 mg/day group vs. 374 (8.4%) in
the simvastatin 20–40 mg/day group. The proportions of subjects who experienced
CV or non-CV death were similar for the LIPITOR 80 mg group and the simvastatin
20–40 mg group.