Table 3.
Clinical characteristics in the cohort following 3:1 propensity score matching
| Characteristic | Propensity score matched data | ||
|---|---|---|---|
| Prolonged mechanical ventilation | P value | ||
| Yes | No | ||
| Unweighted observation, n (%) | 808 (26.9) | 2193 (73.1) | |
| Weighted observation, n (%) | 4008 (26.9) | 10,881 (73.1) | |
| Age (mean, SD) | 65.2 (± 0.54) | 66 (± 0.34) | 0.180 |
| Female, n (%) | 1824 (45.5) | 4957 (45.5) | 0.980 |
| Race | |||
| White, n (%) | 2501 (62.4) | 6978 (64.1) | 0.430 |
| Black, n (%) | 608 (15.2) | 1606 (14.7) | 0.800 |
| Hispanic, n (%) | 361 (9.1) | 883 (8.1) | 0.480 |
| Asian or Pacific, n (%) | 225 (5.6) | 562 (5.1) | 0.660 |
| Obesity, n (%) | 501 (12.5) | 1355 (12.4) | 0.900 |
| Hypertension, n (%) | 2913 (72.6) | 7890 (72.5) | 0.930 |
| Diabetes, n (%) | 996 (24.8) | 2286 (21.1) | 0.040 |
| CAD, n (%) | 996 (24.8) | 3035 (28) | 0.113 |
| Heart failure, n (%) | 1002 (24.9) | 2220 (20.4) | 0.010 |
| Chronic lung disease, n (%) | 714 (17.8) | 1590 (14.6) | 0.066 |
| Pulmonary circulation disorders, n (%) | 330 (8.3) | 678 (6.2) | 0.070 |
| Renal failure, n (%) | 413 (10.3) | 1187 (10.8) | 0.680 |
| Peripheral arterial disease, n (%) | 666 (16.6) | 1575 (14.5) | 0.170 |
Values are mean ± SD for continuous variables and percent for categorical variables. CAD coronary artery disease