Table 2:

EEG recording characteristics in the study cohort

EEG Characteristic
Subjects in whom an EEG was obtained, n/N (%)	278/478 (58%)
Time from study enrollment to EEG initiation
Initiation within 60 minutes, n/N (%)	7/278 (2.5%)
Minutes to initiation, median (IQR)	322 (182–619)
Type and duration of EEG
Routine EEG, total, n/N (%)	90/278 (32%)
Duration ≤1 hour, n/N (%)	65/90 (72%)
Duration 1–2 hours, n/N (%)	8/90 (9%)
Duration > 2 hours, n/N (%)	15/90 (17%)
Duration unknown, n/N (%)	2/90 (2%)
Prolonged/continuous EEG, total, n/N (%)	188/278 (68%)
Duration <24 hours, n/N (%)	110/188 (59%)
Duration ≥24 hours, n/N (%)	76/188 (40%)
Duration unknown, n/N (%)	2/188 (1%)