Table 1.
Baseline clinical characteristics in cohort before matching process
| Characteristic | Before matching | ||
|---|---|---|---|
| Prolonged mechanical ventilation | P value | ||
| Yes | No | ||
| Weighted observation | 5087 (14.9) | 29,097 (85.1) | |
| Age (mean, SD) | 64.3 (± 0.46) | 66.4 (± 0.20) | 0.001 |
| Female | 2275(44.7) | 14,978 (51.5) | 0.001 |
| Race | |||
| White, n (%) | 3082 (60.6) | 19,644 (67.5) | 0.003 |
| Black, n (%) | 819 (16.1) | 3581 (12.3) | 0.014 |
| Hispanic, n (%) | 500 (9.8) | 2346 (8.1) | 0.160 |
| Asian or Pacific, n (%) | 277 (5.4) | 1626 (5.6) | 0.900 |
| Obesity, n (%) | 694 (13.6) | 3151 (10.9) | 0.010 |
| Hypertension, n (%) | 3697 (72.7) | 21,421 (73.7) | 0.530 |
| Diabetes, n (%) | 1277 (25.1) | 6096 (20.9) | 0.001 |
| CAD, n (%) | 1288 (25.3) | 7805 (26.8) | 0.310 |
| Heart failure, n (%) | 1237 (24.3) | 5518 (18.9) | < 0.001 |
| Chronic lung disease, n (%) | 888 (17.4) | 4101 (14.1) | 0.008 |
| Pulmonary circulation disorders, n (%) | 438 (8.6) | 1753 (6.1) | 0.006 |
| Renal failure, n (%) | 530 (10.4) | 2782 (9.5) | 0.406 |
| Peripheral arterial disease, n (%) | 886 (17.4) | 3565 (12.2) | 0.001 |
Values are mean ± SD for continuous variables and percent for categorical variables. CAD: Coronary artery disease