TABLE 1.

Characteristics of ECMO and MVA Patients Before and After Propensity Score Matching

		MVA Patients
Match Categories	ECMO Patients	Pre-Match	P	Post-Match	P
Age, y	49.0 (1.1) [51.0] {22–67}	56.5 (0.9) [59.0] {22–70}	0.001	52.1 (1.0) [53.5] {22–64}	0.06
Male, %	76.3	68.7	0.25	72.5	0.59
BMI, kg/m2	34.1 (0.8) [33.7]	34.5 (0.9) [32.8]	0.69	35.3 (1.2) [32.8]	0.42
Obesity∗, %	71.3	69.6	0.8	72.5	0.86
Ventilator†, days	3.9 (0.4)	4.1 (0.5)	0.72	4.0 (0.5)	0.79
FIO2	0.97 (0.01)	0.94 (0.01)	0.04	0.95 (0.01)	0.26
PEEP, cm H2O	15.6 (0.4)	14.6 (0.3)	0.06	14.7 (0.4)	0.19
ABG values
pH	7.25 (0.01)	7.24 (0.01)	0.84	7.24 (0.01)	0.64
PaCO2, mm Hg	68.2 (2.3)	64.2 (1.9)	0.18	66.5 (2.4)	0.63
PaO2, mm Hg	62.3 (1.9)	68.1 (1.3)	0.01	66.9 (1.4)	0.04
PaO2/FIO2, mm Hg	65.0 (2.2)	73.7 (1.8)	0.002	71.3 (1.9)	0.03
Pronation and/or Chemical Paralysis, %	93.8	98.3	0.1	97.5	0.25

Mean (SEM), [median], {range}.

^∗Obesity is defined by a BMI ≥30 kg/m².

^†Ventilator days refer to number of days intubated at time of ECMO eligibility.

ABG, arterial blood gas; BMI, body mass index; ECMO, extracorporeal membrane oxygenation; FIO₂, fraction of inspired oxygen; MVA, maximum ventilation alone; PaCO₂, partial pressure of carbon dioxide; PaO₂, partial pressure of oxygen.