Table 3. Univariate and multivariate survival analyses of heart failure hospitalization.

Variables	Univariate analysis		Multivariate analysis*
	p value	HR (95% CI)	p value	HR (95% CI)
Age (60 years old = 1)	0.12	1.60 (0.88–3.01)	0.63	1.18 (0.61–2.35)
Gender (female = 1)	0.49	1.26 (0.67–2.54)	0.72	0.87 (0.42–1.90)
Temporal increase in QRS duration (4 ms/year = 1)	0.01	2.18 (1.20–4.07)	0.04	1.98 (1.05–3.80)
Non-RBBB pattern (RBBB pattern = 1)	<0.0001	3.32 (1.84–6.04)	0.0001	3.02 (1.59–5.73)

*Adjusted for age, sex, heart rate, intraventricular conduction pattern (i.e., RBBB pattern vs. non-RBBB pattern), temporal increase in QRS duration, and presence of organic heart disease.

HR = hazard ratio, CI = confidence interval, RBBB = right bundle branch block.