TABLE 3.

EEG Patterns and Outcome

	Poor Outcome* (n = 36)	Good Outcome (n = 27)	Odds Ratio (95% CI)	P
Periodic or rhythmic patterns (n = 40)	29	11	6.4 (2.1–19.6)	0.0012†
Seizures (n = 33)*	23	10	3.0 (1.1–8.5)	0.0372†
NORSE (n = 12)	11	1	12.4 (1.5–103.1)	0.0200†
LRDA (n = 10)	9	1	9.0 (1.1–76.0)	0.0436†
LPD (n = 16)	8	8	0.7 (0.2–2.2)	0.5614
BIPD (n = 3)	3	0	6.0 (0.3–120.2)	0.2445
GPD (n = 10)	9	1	9.0 (1.1–76.0)	0.0436†
GRDA (n = 21)	17	4	5.4 (1.5–18.6)	0.0081‡
GRDA + F (n = 8)	8	0	9.2 (0.4–210.3)	0.1662
Modifier (n = 16)	15	1	10.7 (1.2–94.9)	0.0331†

Good outcome is identified as a Glasgow outcome scale of 4 or 5. Poor outcome is identified as a Glasgow outcome scale of 1, 2, or 3.

^*One patient’s outcome upon discharge was unknown.

^†P ≤ 0.05.

^‡P ≤ 0.01.

BIPD, bilateral independent periodic discharge; GPD, generalized periodic discharge; GRDA, generalized rhythmic delta activity; LPD, lateralized periodic discharge; LRDA, lateralized rhythmic delta activity; NORSE, new-onset refractory status epilepticus.