Table 1

Patient Demographics


PREPARE Patients
(N = 700)
MIRACLE ICD Patients
(N = 415)
EMPIRIC Patients
(N = 276)
Combined Control (MIRACLE ICD and EMPIRIC) Patients
(N = 691)

Gender (N, %)




     Male
555 (79.3%)
310 (74.7%)
222 (80.4%)
532 (77%)
     Female
145 (20.7%)
105 (25.3%)
54 (19.6%)
159 (23%)

Age (years)




     Mean ± Standard Deviation
67.4 ± 12.2
65.4 ± 11.5
65.6 ± 12
65.5 ± 11.7
     Median
68.7
67.9
67.3
67.7
     Minimum – Maximum
19.2 – 92.2
31 – 89
23.3 – 91.4
23.3 – 91.4
     n (%)
700 (100%)
415 (100%)
276 (100%)
691 (100%)

Baseline Left Ventricular Ejection Fraction (%)




     Mean ± Standard Deviation
27.7 ± 10.5
21 ± 6.8
30.3 ± 11
24.7 ± 9.8
     Median
25
20
30
25
     Minimum – Maximum
5 – 80
6 – 35
5 – 70
5 – 70
     n (%)
691 (98.7%)
413 (99.5%)
273 (98.9%)
686 (99.3%)

Baseline New York Heart Association Classification (N, %)




     Class I
117 (16.7%)
0 (0%)
36 (13%)
36 (5.2%)
     Class II
297 (42.4%)
137 (33%)
102 (37%)
239 (34.6%)
     Class III
268 (38.3%)
237 (57.1%)
36 (13%)
273 (39.5%)
     Class IV
18 (2.6%)
41 (9.9%)
3 (1.1%)
44 (6.4%)
     Not Collected*
0 (0%)
0 (0%)
99 (35.9%)
99 (14.3%)

Ischemic Cardiomyopathy
488 (69.7%)
238 (57.5%)
155 (56.2%)
393 (57.0%)

Myocardial Infarction (N, %)
421 (60.1%)
193 (46.6%)
192 (69.6%)
385 (55.8%)

N/A = not collected

*NYHA Class was only collected in the EMPIRIC Trial for patients with documented heart failure

Wilkoff et al. Trials 2006 7:18   doi:10.1186/1745-6215-7-18