Table 2.

Multivariate Cox Proportional Hazards Model of Time to First ICD Shock After Generator Exchange (Top Panel) and Time to First ICD Shock For Detection Rate >200 bpm (Bottom Panel)

Covariate	Hazard Ratio (95% CI)	P Value
Group A (relative to group B)	0.31 (0.29 to 0.33)	<0.001
Age	0.99 (0.99 to 1.00)	0.001
Male sex	1.43 (1.32 to 1.55)	<0.001
Dual‐chamber ICD (relative to single chamber)	0.93 (0.86 to 1.01)	0.088
CRT‐D (relative to single chamber)	1.01 (0.93 to 1.10)	0.743
Implant DFT performed	0.31 (0.29 to 0.33)	0.020
Group A (relative to group B)	0.33 (0.31 to 0.36)	<0.001
Age	0.99 (0.99 to 1.00)	<0.001
Male sex	1.55 (1.40 to 1.73)	<0.001
Dual‐chamber ICD (relative to single chamber)	0.84 (0.75 to 0.93)	0.001
CRT‐D (relative to single chamber)	0.94 (0.85 to 1.05)	0.282
Implant DFT performed	0.88 (0.80 to 0.96)	0.006

bpm indicates beats per minute; CRT‐D, cardiac resynchronization therapy‐defibrillator; DFT, defibrillation threshold test; ICD, implantable cardioverter‐defibrillator.