Table 2

Results of Delivered ICD Therapies According to Intention-to-Treat Analysis

No. of Therapies (# of Treated Patients)Rate per 100 Patient-YearsIRR (95% CI)p Value
OverallStandard interval257 (60)106 (93–120)1.000.002
Long detection112 (34)45 (38–55)0.52 (0.36–0.76)
ATPStandard interval140 (57)58 (49–68)1.00<0.001
Long detection53 (31)22 (16–28)0.49 (0.33–0.72)
ShockStandard interval117 (42)48 (40–58)1.000.026
Long detection59 (26)24 (18–31)0.60 (0.38–0.94)

ATP = antitachycardia pacing; CI = confidence interval; IRR = incidence rate ratio.