Table 4.

Mortality (intention-to-treat)

Outcome	Events		Incidencea		Log rank		95% CI
	Without DF test (N = 537)	With DF test (N = 540)	Without DF test	With DF test	P-value	HR	Lower	Upper
All-cause mortality	44 (8.2%)	52 (9.6%)	0.044	0.053	0.377	0.835	0.559	1.248
Non-cardiac mortality	24 (4.5%)	23 (4.3%)	0.024	0.023	0.907	1.035	0.584	1.833
Unknown (primary organ cause)	6 (1.1%)	10 (1.9%)	0.006	0.01	0.306	0.593	0.216	1.632
Cardiac mortality	14 (2.6%)	19 (3.5%)	0.014	0.019	0.350	0.721	0.361	1.438
Arrhythmic mortality	1 (0.2%)	5 (0.9%)	0.001	0.005	0.100	0.198	0.023	1.694
Non-arrhythmic mortality	13 (2.4%)	13 (2.4%)	0.013	0.013	0.948	0.975	0.452	2.103
Unknown cardiac mortality	0 (0.0%)	1 (0.2%)	0	0.001

DF, defibrillation; HR, hazard ratio; ITT, intention to treat.

^aIncidence referring to person-years without DF test (1001.5) and with DF test (985.9).