Table 1.
Characteristics (During the 6 Months Prior to Baseline) of 2,338 Eligible Surgeons Who Performed Coronary Artery Bypass Grafting for Medicare Beneficiaries, United States, 2012–2016
| Characteristic | No. | Mean (SD) |
|---|---|---|
| Surgeon characteristics | ||
| No. of CABG operations per 90 days | 8.1 (6.3) | |
| Age, years | 50.6 (9.0) | |
| Female sexa | 86 (3.7) | |
| Hospital characteristics | ||
| Total no. of hospitals | 1,035 | |
| No. of CABG operations per 90 days | 29.2 (24.1) | |
| No. of beds | 506.1 (324.7) | |
| Proportion of patients with Medicare | 0.4 (0.1) | |
| Case mix characteristics | ||
| Total no. of patients | 37,991 | |
| Age, years | 74.2 (3.2) | |
| Chronic conditions (surgeon-specific proportion) | ||
| Acute myocardial infarction | 0.1 (0.2) | |
| Dementia | 0.1 (0.1) | |
| Atrial fibrillation | 0.2 (0.2) | |
| Chronic kidney disease | 0.3 (0.2) | |
| Chronic obstructive pulmonary disease | 0.3 (0.2) | |
| Congestive heart failure | 0.4 (0.3) | |
| Diabetes mellitus | 0.5 (0.3) | |
| Stroke or transient ischemic attack | 0.2 (0.2) |
Abbreviations: CABG, coronary artery bypass grafting; SD, standard deviation.
a Values are expressed as number (%).