Table 5. Crude and multivariable adjusted association between BIMA use and a composite endpoint of death or rehospitalization for myocardial infarction, heart failure, or stroke in 49702 patients who underwent primary isolated non-emergent CABG during 1997 to 2008 in Sweden.

	SIMA*	BIMA
Number of patients	49143	559
Number of events (%)	18071 (37)	200 (36)
	HR (95% CI)
Crude	1.00	0.91 (0.79–1.05)
Adjustment for age and sex	1.00	1.02 (0.89–1.18)
Multivariable model**	1.00	1.05 (0.91–1.21)

Reference category.

Multivariable adjustment was made for age, gender, estimated glomerular filtration rate, left ventricular ejection fraction, diabetes mellitus, chronic obstructive pulmonary disease, peripheral vascular disease, preoperative myocardial infarction, stroke, heart failure, perioperative acute kidney injury, and the use of cardiopulmonary bypass during surgery.

BIMA = bilateral internal thoracic artery, CABG = coronary artery bypass grafting, CI = confidence interval, HR = hazards ratio, SIMA = single internal thoracic artery.