
38
C. Safety and Effectiveness Results
a.
Primary Endpoint
The results of the composite primary endpoint of all-cause death or disabling (major)
stroke at 2 years and each component are presented for the ITT population in Table 23
and Figures 18-20. The K-M estimate of the composite event for SAPIEN XT was found
to be non-inferior to that for SAVR (19.3% vs. 21.1%; p=0.0014).
Table 23:
All-Cause Death or Disabling (Major) Stroke at 2 Years
(ITT Population)
SAPIEN XT (N = 1011)
SAVR (N = 1021)
Event
No. of
Events
*
Patients
with
Event
No.
Patients
at Risk
K-M Estimate
†
No. of
Events
*
Patients
with
Event
No.
Patients
at Risk
K-M Estimate
†
Point
Estimate
Standard
Error
Point
Estimate
Standard
Error
All-cause
death or
disabling
stroke at
2 years
229
192
774
19.3%
1.3%
235
202
695
21.1%
1.3%
All-cause
death at
2 years
166
166
798
16.7%
1.2%
170
170
719
18.0%
1.3%
Disabling
stroke at
2 years
63
59
774
6.2%
0.8%
65
61
695
6.4%
0.8%
*
Events with missing or incomplete onset dates are excluded from the analysis.
†
K-M estimates are provided at 2 years (day 730) and use the first event per patient. Events occurring after 730
days are not included in the analysis.