Table 2.

EEG Characteristics Stratified by Outcome.

EEG Characteristics	Dead (N = 62)	Alive (N = 30)	p	CPC 3–5 (N = 81)	CPC 1–2 (N = 11)	p
Maximal Background Frequency (Hz)	6.3	6.7	0.25	6.4	6.2	0.68
Mean Continuity (%)	74.4%	76.5%	0.92	74.2%	81.4%	0.34
Continuous Background	30 (48.4%)	16 (53.3%)	0.66	38 (46.9%)	8 (72.7%)	0.11
Burst Suppression	23 (37.1%)	13 (43.3%)	0.57	32 (39.5%)	4 (36.4%)	0.84
Any Epileptiform Activity	35 (56.5%)	14 (46.7%)	0.38	45 (55.6%)	4 (36.4%)	0.23
Sporadic Epileptiform Activity	31 (50%)	12 (40%)	0.37	40 (49.4%)	3 (27.3%)	0.17
Triphasics	11 (17.7%)	1 (3.3%)	0.05	14.8%	0.0%	0.17
Ictal Interictal Continuum	30 (48.4%)	17 (56.7%)	0.46	41 (50.6%)	6 (54.5%)	0.81
Generalized Rhythmic Delta Activity	14 (22.6%)	11 (36.7%)	0.15	21 (25.9%)	4 (36.4%)	0.47
Lateralized Periodic Discharges	3 (4.8%)	1 (3.3%)	0.74	4 (4.9%)	0 (0%)	0.45
Generalized Periodic Discharges	23 (37.1%)	10 (33.3%)	0.72	31 (38.3%)	2 (18.2%)	0.19
Brief Ictal Rhythmic Discharges	0 (0%)	1 (3.3%)	0.15	1 (1.2%)	0 (0%)	0.71
Stimulus-Induced Periodic Discharges	1 (1.6%)	2 (6.7%)	0.20	2 (2.5%)	1 (9.1%)	0.25
Nonconvulsive Status Epilepticus	1 (1.6%)	2 (6.7%)	0.20	3 (3.7%)	0 (0%)	0.52

CPC: Cerebral Performance Category. EEG: electroencephalography.