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Table 2 Clinical endpoints

From: Broadening the Berlin definition of ARDS to patients receiving high-flow nasal oxygen: an observational study in patients with acute hypoxemic respiratory failure due to COVID-19

 

HFNO (N = 229)

Ventilation (N = 499)

p

Primary endpoint

 ICU mortality, n/N (%)

52/229 (22.7)

172/483 (35.6)

0.001

Secondary endpoints

 28–day mortality, n/N (%)

50/229 (21.8)

159/499 (31.9)

0.007

 90–day mortality, n/N (%)

57/229 (24.9)

178/483 (36.9)

0.002

 Hospital mortality, n/N (%)

56/229 (24.5)

178/483 (36.9)

0.001

 ICU length of stay, days (median [IQR])*

(225/229) 8 [4–19]

(462/483) 13 [7–26]

 < 0.001

 ICU length of stay in survivors, days (median [IQR])*

(168/229) 7 [4–13]

(285/483) 11 [7–30]

 < 0.001

 Hospital length of stay, days (median [IQR])*

(224/229) 14 [10–25]

(462/483) 19 [13–31]

 < 0.001

 Hospital length of stay in survivors, days (median [IQR])*

(167/229) 14 [10–28]

(284/483) 23 [14–45]

 < 0.001

 Need for intubation and ventilation, N (%)

105 (45.8)

  

 Respiratory support free days (median [IQR])

22 [0–25]

9 [0–22]

 < 0.001

  1. Respiratory support free days is the number of days free from HFNO or positive pressure ventilation, and alive on day 28
  2. HFNO high–flow nasal oxygen, ICU intensive care unit, IQR interquartile range, n number, N total number
  3. *Not available in all patients