Table 1. Characteristics of California residents who underwent isolated cardiac bypass.

	Overall
	N	(%)
Overall	63,911	100
Age group
18-49 years	4,289	6.7
50-59 years	13,360	20.9
60-69 years	20,852	32.6
70-79 years	18,825	29.5
80+ years	6,585	10.3
Sex
Male	47,620	74.5
Female	16,291	25.5
Race and ethnicity
White, non-Hispanic	40,716	63.7
Black, non-Hispanic	2,148	3.4
Hispanic	10,226	16
Other	8,060	12.6
Missing	2,761	4.3
Primary payer
Medicare	33,467	52.4
Medicaid	4,789	7.5
Private	22,118	34.6
Other	3,537	5.5
Comorbid medical conditions1
0	2,172	3.4
1-2	22,784	35.7
3-4	23,848	37.3
5 +	15,107	23.6
Scheduled admission	29,141	45.6
Primary diagnosis of myocardial infarction	15,681	24.5
Secondary diagnosis of myocardial infarction	4,053	6.3
Percutaneous coronary intervention during same hospitalization	963	1.5
Revascularization with internal mammary artery	56,949	89.1
Vessels bypassed
1 vessel	47,925	75.0
2 vessels	6,651	10.4
3 vessels	5,100	8.0
4+ vessels	3,082	4.8
Not specified	1,153	1.8
Off-pump surgery	13,879	21.7
In-hospital outcomes
Intra-operative morbidity	3,631	5.7
Post-operative morbidity	14,680	23.0
Median length of stay, days (standard deviation)	8	(6.6)

¹Number of Elixhauser¹⁴ comorbidities present