Table 3. Univariate analysis for conversion.

	Univariate analysis		p
	OR	95% CI
Age	1.06	1.01-1.11	0.01*
Sex
Male	0.86	0.24-3.07	0.82
Diabetes mellitus	1.85	0.82-4.16	0.13
Renal failure	1.98	0.41-9.58	0.39
COPD	1.46	0.52-4.03	0.46
Ejection fraction	0.98	0.93-1.02	0.29
CABG for single-vessel coronary artery disease	0.58	0.25-1.32	0.19
OR: Odds ratio; CI: Confidence interval; COPD: Chronic obstructive pulmonary disease; CABG: Coronary artery bypass grafting.