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. 2022 Apr 19;10(2):E379–E389. doi: 10.9778/cmajo.20210216

Table 2:

Outcomes, overall and in waves 1, 2 and 3

Variable No. (%) of patients*
Overall
n = 1337
Wave 1
n = 520
Wave 2
n = 572
Wave 3
n = 245
28-day mortality 207 (15.5) 95 (18.3) 93 (16.3) 19 (7.8)
In-hospital death 238 (17.8) 111 (21.3) 103 (18.0) 24 (9.8)
Admitted to intensive care unit 495/1336 (37.1) 201 (38.7) 215 (37.6) 79/244 (32.4)
Organ support during hospital stay
 All patients
  Invasive mechanical ventilation 281 (21.0) 130 (25.0) 116 (20.3) 35 (14.3)
  Renal replacement therapy or dialysis 68/1320 (5.2) 33/511 (6.5) 30/567 (5.3) 5/242 (2.1)
  Vasopressor 285 (21.3) 120 (23.1) 123 (21.5) 42 (17.1)
 Patients admitted to intensive care unit
  Invasive mechanical ventilation 276/495 (55.8) 130/201 (64.7) 111/215 (51.6) 35/79 (44.3)
  Renal replacement therapy or dialysis 49/484 (10.1) 25/193 (13.0) 20/213 (9.4) 4/78 (5.1)
  Vasopressor 276/495 (55.8) 118/201 (58.7) 117/215 (54.4) 41/79 (51.9)
Organ support during first 14 d
 Invasive mechanical ventilation 275 (20.6) 127 (24.4) 115 (20.1) 33 (13.5)
 Renal replacement therapy or dialysis 55/1315 (4.2) 26/508 (5.1) 24/565 (4.2) 5/242 (2.1)
 Vasopressor 278/1335 (20.8) 116 (22.3) 121/571 (21.2) 41/244 (16.8)
DAF of invasive mechanical ventilation during first 14 d, mean ± SD 10.8 ± 5.4
n = 1330
10.0 ± 5.9
n = 518
11.0 ± 5.3
n = 570
12.2 ± 4.3
n = 242
DAF of renal replacement therapy during first 14 d, mean ± SD 12.2 ± 4.6
n = 1319
11.8 ± 5.0
n = 509
12.3 ± 4.5
n = 567
13.1 ± 3.4
n = 243
DAF of vasopressor first 14 d, mean ± SD 11.3 ± 5.1
n = 1331
10.7 ± 5.5
n = 518
11.3 ± 5.0
n = 570
12.4 ± 3.9
n = 243
Hospital length of stay, d
 Survivors
  Median (IQR) 9.0 (5.0–19.0) 13.0 (7.0–25.0) 8.0 (5.0–15.0) 9.0 (5.0–15.0)
  Range 2.0–135.0 2.0–135.0 2.0–77.0 2.0–66.0
 Decedents
  Median (IQR) 11.0 (6.0–20.0) 11.0 (6.0–21.0) 11.0 (7.0–20.0) 12.0 (9.5–24.0)
  Range 0.0–63.0 0.0–63.0 1.0–44.0 2.0–62.0
Intensive care unit length of stay, d
 Survivors
  Median (IQR) 8.0 (4.0–14.0) 10.0 (4.0–17.0) 7.0 (4.0–11.0) 7.0 (2.0–13.5)
  Range 0.0–86.0 0.0–86.0 1.0–39.0 1.0–54.0
 Decedents
  Median (IQR) 14.0 (6.0–24.0) 15.0 (5.0–26.0) 12.0 (7.0–21.0) 16.0 (10.0–49.0)
  Range 0.0–61.0 0.0–61.0 0.0–38.0 3.0–57.0

Note: DAF = days alive and free, IQR = interquartile range, SD = standard deviation.

*

Except where noted otherwise.

Patients who were discharged alive before day 28 and were lost to follow-up were assumed to be survivors at day 28 (n = 185, 177 and 81 for waves 1, 2 and 3, respectively).