Table 1.
Baseline Demographics
| Covariates | Unmatched Cohort | Matched Cohort | ||||
|---|---|---|---|---|---|---|
| General Population (N=81 197) | South Asians (N=2653) | St. Diff | General Population (N=2473) | South Asians (N=2473) | St. Diff | |
| Age, y | 64.1±10.0 | 61.7±9.4 | 0.25 | 61.8±10.2 | 61.6±9.5 | 0.02 |
| Creatinine | 97.3±56.0 | 95.2±55.3 | 0.04 | 95.6±51.5 | 95.0±55.5 | 0.01 |
| Urgency rating score | 4.6±1.2 | 4.7±1.1 | 0.08 | 4.6±1.1 | 4.7±1.1 | 0.07 |
| Male, n (%) | 63 186 (77.8) | 2054 (77.4) | 0.01 | 1894 (76.6) | 1910 (77.2) | 0.02 |
| Diabetes mellitus, n (%) | 28 332 (34.9) | 1435 (54.1) | 0.40 | 1334 (53.9) | 1327 (53.7) | 0.01 |
| HTN, n (%) | 58 772 (72.4) | 2063 (77.8) | 0.12 | 1982 (80.1) | 1919 (77.6) | 0.06 |
| History of smoking, n (%) | 48 138 (59.3) | 718 (27.1) | 0.66 | 695 (28.1) | 673 (27.2) | 0.02 |
| Hyperlipidemia, n (%) | 42 369 (52.2) | 1547 (58.3) | 0.12 | 1525 (61.7) | 1438 (58.1) | 0.07 |
| Previous MI, n (%) | 36 570 (45.0) | 1181 (44.5) | 0.01 | 1068 (43.2) | 1108 (44.8) | 0.03 |
| Acute MI, n (%) | 18 730 (23.1) | 662 (25.0) | 0.04 | 619 (25.0) | 623 (25.2) | 0 |
| CHF, n (%) | 11 517 (14.2) | 352 (13.3) | 0.03 | 334 (13.5) | 326 (13.2) | 0.01 |
| CVD, n (%) | 9457 (11.6) | 229 (8.6) | 0.09 | 221 (8.9) | 206 (8.3) | 0.02 |
| PVD, n (%) | 12 110 (14.9) | 205 (7.7) | 0.20 | 185 (7.5) | 189 (7.6) | 0.01 |
| COPD, n (%) | 5821 (7.2) | 97 (3.7) | 0.14 | 81 (3.3) | 87 (3.5) | 0.01 |
| Dialysis, n (%) | 943 (1.2) | 31 (1.2) | 0 | 30 (1.2) | 24 (1.0) | 0.02 |
| Previous PCI, n (%) | 7268 (9.0) | 193 (7.3) | 0.06 | 174 (7.0) | 186 (7.5) | 0.02 |
| Previous CABG, n (%) | 2359 (2.9) | 40 (1.5) | 0.08 | 37 (1.5) | 34 (1.4) | 0.01 |
| Left main disease, n (%) | 19 745 (24.3) | 486 (18.3) | 0.14 | 532 (21.5) | 458 (18.5) | 0.07 |
| MVD, n (%)a | 62 922 (77.5) | 2085 (78.6) | 0.03 | 1945 (78.6) | 1954 (79.0) | 0.01 |
| CCS class, n (%) | 0.03 | 0.02 | ||||
| 1 | 3604 (4.4) | 139 (5.2) | 131 (5.3) | 130 (5.3) | ||
| 2 | 12 365 (15.2) | 451 (17.0) | 432 (17.5) | 428 (17.3) | ||
| 3 | 25 600 (31.5) | 754 (28.4) | 642 (26.0) | 705 (28.5) | ||
| 4 | 38 325 (47.2) | 1283 (48.4) | 1268 (51.3) | 1210 (48.9) | ||
| LVEF grade, n (%) | 0 | 0.05 | ||||
| 1 | 36 442 (44.9) | 1164 (43.9) | 1038 (42.0) | 1106 (44.7) | ||
| 2 | 26 453 (32.6) | 945 (35.6) | 941 (38.1) | 901 (36.4) | ||
| 3 | 12 868 (15.8) | 448 (16.9) | 434 (17.9) | 419 (16.9) | ||
| 4 | 2734 (3.4) | 53 (2.0) | 51 (2.1) | 47 (1.9) | ||
Acute MI indicates any myocardial infarction within 30 days prior to index coronary artery bypass graft (CABG); CCS, Canadian Cardiovascular Society Class; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; CVD, cerebrovascular disease; HTN, hypertension; LVEF, left ventricular ejection fraction; previous MI, previous myocardial infarction (any MI within 15 years prior to index CABG); PCI, percutaneous coronary intervention; PVD, peripheral vascular disease; St. Diff, standardized difference (less than 0.1 is negligible).
MVD, multivessel disease (defined as left main disease, double or triple vessel disease including the proximal left anterior descending artery [LAD], or 3‐vessel disease without proximal LAD). Hyperlipidemia is defined as documented history of dyslipidemia diagnosed and/or treated by a physician.