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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: Epilepsia. 2013 Jul 12;54(8):1419–1427. doi: 10.1111/epi.12261

Table 1.

Subject and CEEG monitoring characteristics by center (N=550).

Center Days for
50
Subjects
Age
in months
median
(IQR)
Sex (male)
N (%)
Clinical
seizure
prior to
CEEG
N (%)
Prior
developmental
delay or
intellectual
disability
N (%)
Prior
Epilepsy
N (%)
CEEG
>24 hours
N (%)
Seizure Occurrence by Acute Neurologic
Diagnosis Category
N with seizures / N in category (%)
CEEG Monitoring Indication **
N (%)
Mortality
N (%)
Acute
Structural
Acute Non-
Structural
Epilepsy-
Related
Encephalopathy Event RSE
Management
1 920 44.5 (15,134) 27 (54%)* 41 (82%) 35 (70%) 30 (60%) 25 (50%) 1/5 (20%) 3/12 (25%) 17/33 (52%) 11 (22%) 38 (76%) 13 (26%) 2 (4%)
2 52 24 (3, 144) 28 (56%) 23 (46%) 19 (38%) 9 (18%) 5 (10%) 1/20 (5%) 4/22 (18%) 3/8 (38%) 18 (36%) 18 (36%) 6 (12%) 6 (12%)
3 496 36 (11,113) 29 (58%) 33 (66%) 30 (60%) 19 (38%) 25 (50%) 7/23 (30%) 0/10 (0%) 6/17 (35% 39 (78%) 21 (42%) 6 (12%) 3 (6%)
4 416 28 (6,91) 30 (60%) 26 (52%) 24 (48%) 15 (30%) 18 (38%) 7/21 (33%) 3/17 (18%) 7/12 (58%) 41 (82%) 17 (34%) 1(2%) 13 (26%)
5 769 56.2 (9,147) 24 (48%) 32 (64%) 25 (50%) 20 (40%) 34 (68%) 4/25 (16%) 3/13 (23%) 9/12 (75%) 47 (94%) 13 (26%) 2 (4%) 10 (20%)
6 148 57.5 (11.5,138.5) 33 (66%) 20 (40%) 14 (28%) 15 (30%) 19 (38%) 3/28 (11%) 2/10 (20%) 8/12 (67%) 30 (60%) 16 (32%) 10 (20%) 2 (4%)
7 293 31 (9.5,82) 25 (50%) 26 (52%) 15 (30%) 12 (24%) 36 (72%) 10/30 (33%) 3/8 (38%) 3/12 (25%) 50 (100%) 17 (34%) 1 (2%) 12 (24%)
8 146 23 (5,110) 29 (58%) 19 (38%) 12 (24%) 11 (22%) 36 (72%) 9/32 (28%) 0/3 (0%) 7/15 (47%) 38 (76%) 7 (14%) 4 (8%) 10 (20%)
9 239 61.7 (13.8,149.6) 17 (34%) 38 (76%) 15 (30%) 11 (22%) 30 (60%) 5/26 (19%) 2/13 (15%) 5/11 (45%) 41 (82%) 27 (54%) 7 (14%) 10 (20%)
10 694 30.5 (11,102) 30 (60%) 27 (54%) 16 (32%) 14 (28%) 21 (42%) 4/16 (25%) 3/16 (19%) 8/18 (44%) 39 (78%) 9 (18%) 2 (4%) 3 (6%)
11 635 25.5 (9,109) 23 (46%) 20(40%) 22 (44%) 18 (38%) 18 (38%) 7/19 (37%) 0/17 (0%) 8/14 (57%) 14 (28%) 26 (52%) 10 (20%) 2 (4%)
Overall
N (%)
Median (IQR)
416 (194-665)
Median (IQR)
36.5 (9-122)
295 (54%) 305 (55%) 227 (41%) 174 (32%) 267 (49%) 58/245 (24%) 23/141 (16%) 81/164 (49%) 386 (67%) 209 (38%) 62 (11%) 72 (13%)
p-value 0.41 0.1 <0.001 <0.001 0.005 <0.001 <0.001*** <0.001 <0.001 <0.001 <0.001
0.22 0.46 0.41

Notes:

*

Cells values represent the number of subjects. For example, 27 of 50 subjects (54%) from Center 1 were male.

**

Subjects could have multiple CEEG monitoring indications.

***

There was a significant difference in seizure occurrence by acute neurologic diagnosis category (p<0.001) but within each acute neurologic diagnosis category there was no significant difference in seizure occurrence by center (Acute Structural p=0.22, Acute Non-Structural p=0.46, Epilepsy-Related p=0.41).