Table 2.

Hospitalization rates for each group and comparison of event rates

	Events per patient year (95% CI)		Incidence rate ratio (95% upper confidence limit)	P value (one-sided)
	Treatment group (Quadra)	Control group (Bipolar)
Primary endpoint
HF hospitalizations and LV lead surgical revision	0.15 (0.08, 0.26)	0.32 (0.20, 0.53)	0.46 (0.97)	0.04
Additional hospitalization rates
HF hospitalizations	0.14 (0.08, 0.24)	0.28 (0.17, 0.45)	0.49 (1.04)	0.06
Other hospitalizations not related to HF and LV lead surgical revision	0.43 (0.29, 0.64)	0.49 (0.33, 0.72)	0.89 (1.53)	0.14
All cause hospitalization	0.62 (0.42, 0.90)	0.88 (0.61, 1.26)	0.70 (1.19)	0.13

All event rates derived using negative binomial regression.

LV, left ventricular.