Outcome variables. Data are expressed as mean ± SD, median (interquartile range), or number and percentage (%).

Table 2: Outcome variables. Data are expressed as mean ± SD, median (interquartile range), or number and percentage (%).

	HFO Group N = 111	Control Group N = 111	P
FiO₂ at 12-h after extubation	34.6 ± 7.4	35.2 ± 7.6	0.50
Hypercapnia after extubation	8 (7.2%)	7 (6.3%)	0.80
Gas-flow (HFO) at 12-h after extubation, L/min	34.2 ± 4.2	NA
All-cause reintubation	9 (8.1%)	17 (15.3%)	0.09
Low risk group	2/45 (4.4%)	6/45 (13.3%)	0.26
Non-respiratory related causes	1/2 (50%)	1/6 (16.5%)	0.46
High risk group	7/66 (10.6%)	11/66 (16.6%)	0.31
Non-respiratory related causes	2/7 (28.5%)	3/11 (27.3%)	0.99
Time to reintubation requirement, median hours	35 (24-60)	12 (4-19)	< 0.01
ICU length of stay, days	11 (6-14)	14 (7-19)	0.05
Hospital length of stay, days	17 (10-22)	18 (12-25)	0.09
ICU mortality	4 (3.6%)	7 (6.3%)	0.35
ICU mortality in reintubated patients	4 (44%)	7 (41%)	0.99
Hospital mortality	7 (6.3%)	9 (8.1%)	0.60

ICU = intensive care unit; HFO = high flow oxygen therapy.