Simplified frontal EEG in adults under veno-arterial extracorporeal membrane oxygenation

Annals of Intensive Care

Table 2 Association between EEG parameters and outcomes

Outcomes	Day-28 mortality		Day-90 mRS ≥ 4
Variable	Adjusted OR^a	95% CI	Adjusted OR^a	95% CI
Synek score, _4-frontEEG (per 1-point increment)	1.67	[1.25; 2.24]	1.83	[1.25; 2.70]
Synek score, _stdEEG (per 1-point increment)	1.55	[1.16; 2.07]	1.68	[1.13; 2.49]
Background rhythm _stdEEG (per 1-Hz increment)	0.71	[0.52; 0.97]	0.73	[0.52; 1.03]

The Synek score ranges from 1 to 5, with higher scores indicating more severe encephalopathy
mRS: modified Rankin scale; OR: odds ratio; EEG: electroencephalography; _4-frontEEG: 4-electrode montage; _stdEEG: 21-electrode montage
^aThe association between each EEG variable (background rhythm, and Synek’s scores on _4-frontEEG and _stdEEG) and outcomes (day-28 mortality and day-90 mRS score ≥ 4) were evaluated using logistic regression analyses adjusted for age, pre-ECMO cardiac arrest, and non-neurological SOFA score at time of cannulation