Table 2.

Firth logistic model for predicting permanent pacemaker placement in patients who underwent isolated valve surgery and CABG with valve surgery

Variable	Odds ratio (95% Confidence interval)	P value
Age	1.04 (1.01-1.06)	<.001
V-tach/V-fib	3.90 (1.59-9.59)	.01
Third-degree heart block	5.26 (1.00-27.53)	.0496
Atrial fibrillation/flutter	1.53 (1.05-2.24)	.03
Ejection fraction	0.98 (0.97-1.00)	.02

All variables with a P value < .1 were kept in the model. V-tach, Ventricular tachycardia; V-fib, ventricular fibrillation.