Table 3.
Rates of Death and the Study Outcomes Determined for Survivors Based on the Cumulative Duration of Mechanical Ventilation and the Number of Mechanical Ventilation Courses
| No. (%) of Patients | ||||
|---|---|---|---|---|
| Variable | BPD | Discharged on Oxygen | Tracheostomy | Deatha |
| Duration of mechanical ventilation, d | ||||
| ≤7 (n = 759) | 202 (26.6) | 102 (13.4) | 1 (0.1) | 177 (18.9) |
| 8–21 (n = 562) | 287 (51.1) | 109 (19.4) | 1 (0.2) | 116 (17.1) |
| 22–35 (n = 382) | 248 (64.9) | 115 (30.1) | 2 (0.5) | 60 (13.6) |
| ≥36 (n = 1164) | 957 (82.2) | 530 (45.5) | 27 (2.3) | 123 (9.6) |
| P value | <.001 | <.001 | <.001 | <.001 |
| No. of mechanical ventilation courses | ||||
| 1 (n = 921) | 335 (36.4) | 165 (17.9) | 2 (0.2) | 162 (15.0) |
| 2 (n = 636) | 360 (56.5) | 183 (28.8) | 7 (1.1) | 93 (12.8) |
| 3 (n = 502) | 345 (68.7) | 178 (35.5) | 3 (0.6) | 71 (12.4) |
| ≥4 (n = 808) | 654 (80.9) | 330 (40.8) | 19 (2.4) | 150 (15.7) |
| P value | <.001 | <.001 | <.001 | .18 |
a
Numbers of deaths determined for the full cohort are as follows: 936, 678, 442, and 1287 for the 7 days or less, 8 through 21 days, 22 through 35 days, and 36 days or more of mechanical ventilation, respectively, and 1083, 729, 573, and 958 for 1, 2, 3, and 4 or more courses of mechanical ventilation, respectively.