Table E2.
Preoperative characteristics of Medicaid/uninsured patients who underwent coronary artery bypass grafting at SNH versus non-SNHs
| Variable | Unmatched (n = 51,116) |
Matched (n = 33,675) |
||||
|---|---|---|---|---|---|---|
| SNHs (n = 15,461) | Non-SNHs (n = 35,655) | P value | SNHs (n = 15,239) | Non-SNHs (n = 18,436) | SMD | |
| Age, y | 58 (52-62) | 57 (51-61) | <.001 | 58 (52-62) | 57 (51-61) | −0.140 |
| Male | 11,085 (71.7%) | 25,619 (71.9%) | .82 | 10,930 (71.7%) | 12,982 (70.4%) | −0.029 |
| Elixhauser score | 7 (−1-17) | 7 (−1-17) | .61 | 7 (−1-17) | 8 (−1-18) | 0.038 |
| Anemia | 683 (4.4%) | 1236 (3.5%) | <.001 | 650 (4.3%) | 813 (4.4%) | 0.010 |
| Arrhythmia | 5552 (35.9%) | 12,806 (35.9%) | .99 | 5470 (35.9%) | 6702 (36.4%) | 0.010 |
| Chronic kidney disease | 2746 (17.8%) | 5887 (16.5%) | .05 | 2702 (17.7%) | 3368 (18.3%) | 0.014 |
| Chronic obstructive pulmonary disease | 3790 (24.5%) | 10,634 (29.8%) | <.001 | 3751 (24.6%) | 5285 (28.7%) | 0.092 |
| Coagulopathy | 2548 (16.5%) | 6301 (17.7%) | .23 | 2521 (16.5%) | 3169 (17.2%) | 0.017 |
| Congestive heart failure | 6676 (43.2%) | 15,047 (42.2%) | .29 | 6562 (43.1%) | 8085 (43.9%) | 0.016 |
| Diabetes mellitus | 8704 (56.3%) | 18,508 (51.9%) | <.001 | 8532 (56.0%) | 10,248 (55.6%) | −0.008 |
| Drug abuse | 1544 (10.0%) | 3198 (9.0%) | .04 | 1490 (9.8%) | 1987 (10.8%) | 0.033 |
| Hypertension | 13,820 (89.4%) | 30,729 (86.2%) | <.001 | 13,606 (89.3%) | 16,253 (88.2%) | −0.035 |
| Liver disease | 707 (4.6%) | 1721 (4.8%) | .40 | 698 (4.6%) | 946 (5.1%) | 0.026 |
| Obesity | 4558 (29.5%) | 11,429 (32.1%) | .01 | 4511 (29.6%) | 5581 (30.3%) | 0.015 |
| Peripheral arterial disease | 1912 (12.4%) | 4816 (13.5%) | .03 | 1888 (12.4%) | 2415 (13.1%) | 0.021 |
| Tobacco use | 9272 (60.0%) | 23,109 (64.8%) | <.001 | 9157 (60.1%) | 11,704 (63.5%) | 0.070 |
| Valvular heart disease | 2282 (14.8%) | 5068 (14.2%) | .46 | 2251 (14.8%) | 2634 (14.3%) | −0.014 |
| Household income∗ | .04 | |||||
| Quartile 1 | 6107 (39.5%) | 12,761 (35.8%) | 5903 (38.7%) | 7608 (41.3%) | 0.052 | |
| Quartile 2 | 4379 (28.3%) | 11,262 (31.6%) | 4366 (28.7%) | 5469 (29.7%) | 0.022 | |
| Quartile 3 | 3242 (21.0%) | 7528 (21.1%) | 3238 (21.3%) | 3483 (18.9%) | −0.059 | |
| Quartile 4 | 1733 (11.2%) | 4105 (11.5%) | 1732 (11.4%) | 1876 (10.2%) | −0.038 | |
| Nonelective | 10,740 (69.5%) | 24,076 (67.5%) | .12 | 10,526 (69.2%) | 12,681 (69.2%) | −0.007 |
Categorical variables are presented as number (%), and continuous variables are presented as median (interquartile range). SNH, Safety-net hospital. SMD, standardized mean difference.
∗
Indexed to patient's ZIP code.