Table 1.
Baseline characteristics of the overall cohort
| Characteristics | Before propensity-score matching |
After propensity-score matching |
||||||
|---|---|---|---|---|---|---|---|---|
| CABG in 2020 (Total N = 3569) | CABG in 2019 (Total N = 5534) | P value | SMD | CABG in 2020 (Total N = 3569) | CABG in 2019 (Total N = 3569) | P value | SMD | |
| Demographics | ||||||||
| Age (Years) | 67 (60, 74) | 66 (59, 73) | .001 | 0.09 | 66 (59, 73) | 67 (59, 73) | .23 | 0.02 |
| Sex | ||||||||
| Male | 2664 (75.6%) | 4108 (74.2%) | .66 | 0.01 | 2664 (74.6%) | 2647 (74.2%) | .64 | 0.01 |
| Female | 905 (25.4%) | 1426 (25.8%) | 905 (24.4%) | 922 (25.8%) | ||||
| Race/ethnicity | ||||||||
| Non-Hispanic White | 2969 (83.2%) | 4517 (81.6%) | .51 | 0.04 | 2969 (83.2%) | 2957 (82.9%) | .76 | 0.005 |
| Non-Hispanic Black | 293 (8.2%) | 514 (9.3%) | 293 (8.2%) | 322 (9.0%) | ||||
| Non-Hispanic Asian | 91 (2.6%) | 151 (2.7%) | 91 (2.6%) | 92 (2.6%) | ||||
| Hispanic | 198 (5.6%) | 326 (5.9%) | 198 (5.6%) | 181 (5.1%) | ||||
| Other Non-Hispanic | 18 (0.4%) | 26 (0.4%) | 18 (0.4%) | 17 (0.4%) | ||||
| BMI, kg/m2 | 29.7 (22.6, 35.8) | 29.8 (23.1, 36.2) | .46 | 0.03 | 29.7 (22.8, 35.6) | 29.8 (23.4, 34.9) | .52 | 0.02 |
| Medical history | ||||||||
| Alcohol abuse | 146 (4.1%) | 234 (4.2%) | .75 | 0.007 | 146 (4.1%) | 147 (4.1%) | .95 | 0.001 |
| Asthma | 246 (6.9%) | 401 (7.3%) | .52 | 0.02 | 246 (6.9%) | 240 (6.7%) | .78 | 0.007 |
| Cerebrovascular disease | 1041 (29.2%) | 1711 (30.9%) | .08 | 0.04 | 1041 (29.2%) | 1054 (29.5%) | .73 | 0.008 |
| Chronic kidney disease | 794 (22.3%) | 1366 (24.7%) | .008 | 0.06 | 794 (22.3%) | 755 (21.2%) | .27 | 0.02 |
| Chronic obstructive pulmonary disease | 246 (6.9%) | 401 (7.3%) | .52 | 0.01 | 246 (6.9%) | 240 (6.7%) | .78 | 0.006 |
| Diabetes mellitus | 1645 (46.1%) | 2511 (45.4%) | .50 | 0.01 | 1645 (46.1%) | 1641 (46.0%) | .93 | 0.002 |
| Heart failure | 1471 (41.2%) | 2403 (43.4%) | .04 | 0.05 | 1471 (41.2%) | 1453 (40.7%) | .67 | 0.01 |
| Hypertensive diseases | 2463 (69.0%) | 3874 (70.0%) | .87 | 0.003 | 2463 (69.0%) | 2481 (69.5%) | .90 | 0.006 |
| Ischemic heart disease | 3396 (95.2%) | 5296 (95.7%) | .22 | 0.03 | 3396 (95.2%) | 3401 (95.3%) | .74 | 0.008 |
| Neoplasms | 691 (19.4%) | 1111 (20.1%) | .40 | 0.02 | 691 (19.4%) | 682 (19.1%) | .79 | 0.006 |
| Nicotine dependence | 778 (21.8%) | 1150 (20.8%) | .25 | 0.03 | 778 (21.8%) | 767 (21.5%) | .76 | 0.007 |
Continuous data are presented as median with interquartile range, and categorical data are presented as counts with percentage. CABG, Coronary artery bypass grafting; SMD, standardized mean difference; BMI, body mass index.