Table 2.

Patient outcomes stratified by ambulatory oxygen saturation among admitted and discharged ED patients.

Patient outcome	Admitted on first ED Visit (n = 165)	Bounceback admission (n = 50)
Among all patients
Low oxygen requirement	103 (62%)	24 (48%)
High oxygen requirement	49 (30%)	19 (38%)
Mechanical ventilation	13 (8%)	7 (14%)
Ambulatory oxygen saturation 98% to 100%
Low oxygen requirement	0 (0%)	2 (40%)
High oxygen requirement	0 (0%)	2 (40%)
Mechanical ventilation	0 (0%)	1 (20%)
Ambulatory oxygen saturation 95% to 97%
Low oxygen requirement	15 (94%)	9 (50%)
High oxygen requirement	1 (6%)	6 (33%)
Mechanical ventilation	0 (0%)	3 (17%)
Ambulatory oxygen saturation 93% to 94%
Low oxygen requirement	15 (79%)	9 (53%)
High oxygen requirement	3 (16%)	7 (41%)
Mechanical ventilation	1 (5%)	1 (6%)
Ambulatory oxygen saturation 90% to 92%
Low oxygen requirement	22 (65%)	4 (40%)
High oxygen requirement	10 (29%)	4 (40%)
Mechanical ventilation	2 (6%)	2 (20%)
Ambulatory oxygen saturation 89% and below
Low oxygen requirement	51 (53%)	0 (0%)
High oxygen requirement	35 (37%)	0 (0%)
Mechanical ventilation	10 (10%)	0 (0%)

ED, emergency department.