Table 1.
Baseline characteristics in the unmatched and matched study populations.
| Parameter | Unmatched patients (n = 881) | Matched patients (n = 336) | ||||
|---|---|---|---|---|---|---|
| CABG group | LVAD group | SMD | CABG group | LVAD group | SMD | |
| n = 324 | n = 557 | % | n = 168 | n = 168 | % | |
| Age (years)a | 65.9 ± 10.7 | 60.0 ± 8.6 | 61.9 | 62.6 ± 10.6 | 62.3 ± 8.0 | 3.2 |
| Sex, maleb | 282 (87.0) | 500 (89.8) | −13.0 | 148 (88.1) | 151 (90.5) | −8.9 |
| Body mass index (kg/m2)a | 27.3 ± 4.7 | 26.7 ± 4.9 | 12.5 | 27.1 ± 5.0 | 27.0 ± 5.1 | 2.0 |
| Diabetes mellitusb | 146 (45.1) | 191 (34.3) | 31.7 | 65 (38.7) | 61 (36.3) | 7.0 |
| Insulin-dependent diabetes mellitusb | 83 (25.6) | 42 (7.5) | 91.3 | 25 (14.9) | 26 (15.5) | −2.3 |
| Myocardial infarctionb | 150 (46.3) | 106 (19.0) | 95.9 | 58 (34.5) | 56 (33.3) | 3.5 |
| Mitral regurgitationa,c | 0.76 ± 0.75 | 1.20 ± 0.77 | −57.9 | 0.95 ± 0.77 | 0.99 ± 0.76 | −5.2 |
| Cardiac arrestb | 27 (8.3) | 45 (8.1) | 1.0 | 18 (10.7) | 19 (11.3) | −2.6 |
| Renal replacement therapyb | 18 (5.6) | 80 (14.4) | −34.3 | 15 (8.9) | 16 (9.5) | −2.8 |
| Chronic obstructive pulmonary diseaseb | 66 (20.4) | 87 (15.6) | 18.1 | 34 (20.2) | 32 (19.0) | 4.2 |
| Peripheral vascular diseaseb | 62 (19.1) | 90 (16.2) | 10.8 | 31 (18.5) | 33 (19.6) | −3.8 |
| Strokeb | 16 (4.9) | 63 (11.3) | −27.4 | 9 (5.4) | 9 (5.4) | 0.0 |
| Mechanical ventilationb | 31 (9.6) | 99 (17.8) | −29.5 | 24 (14.3) | 21 (12.5) | 7.4 |
| Inotropic supportb | 114 (35.2) | 429 (77.0) | −139.6 | 84 (50.0) | 92 (54.8) | −13.5 |
| Mechanical circulatory support2 | 42 (13.0) | 127 (22.8) | −32.3 | 32 (19.0) | 34 (20.2) | −4.1 |
| MELD-XIa | 13.3 ± 4.7 | 15.8 ± 5.6 | −48.4 | 13.8 ± 5.4 | 13.8 ± 4.6 | 0.0 |
CABG, coronary artery bypass grafting; LVAD, left ventricular assist device; SMD, standardized mean difference
MELD-XI, model for end-stage liver disease.
a
mean and standard deviation.
b
number and percentage.
c
scale ranging from 0 to 3.