TABLE 2.
Electrographic Risk Factors of Electrographic Sz
| Univariate | |||||
|---|---|---|---|---|---|
| Factor | Whole cohort, n = 665 | EEG Sz, n = 151 | No EEG Sz, n = 514 | p | OR [95% CI] |
| LPDs | 90 (14%) | 41 (27%) | 49 (10%) | <0.001 | 3.6 [2.2–5.9] |
| BIPDs | 6 (1%) | 2 (1%) | 4 (1%) | 0.326 | 2.1 [0.4–11.2] |
| GPDs | 66 (10%) | 7 (5%) | 59 (11%) | 0.113 | 0.5 [0.2–1.2] |
| LRDA | 49 (7%) | 17 (11%) | 32 (6%) | 0.049 | 1.9 [1.03–3.55] |
| GRDA | 44 (7%) | 4 (3%) | 40 (8%) | 0.140 | 0.43 [0.2–1.2] |
| LSW | 2 (0%) | 1 (1%) | 1 (0%) | 0.348 | 4.3 [0.3–69.1] |
| SED | 133 (20%) | 35 (23%) | 98 (19%) | 0.100 | 1.5 [0.9–2.5] |
| BIRDs | 9 (1%) | 7 (5%) | 2 (0%) | <0.001 | 14.9 [3.0–73.6] |
| Combined LPD, BIPD, LRDA, LSW, SED, and/or BIRDs | 250 (38%) | 83 (55%) | 167 (32%) | <0.001 | 2.5 [1.8–3.7] |
| No discharge | 321 (48%) | 61 (40%) | 260 (51%) | Reference | |
Data are presented as No. (%).
BIPD = bilateral independent periodic discharge; BIRD = brief potentially ictal rhythmic discharge; CI = confidence interval; EEG = electroencephalographic; GPD = generalized periodic discharge; GRDA = generalized rhythmic delta activity; LPD = lateralized periodic discharge; LRDA = lateralized rhythmic delta activity; LSW = lateralized spike-and-wave discharge; OR = odds ratio; SED = sporadic epileptiform discharge; Sz = seizures.