TABLE 1.

Clinical Characteristics of Continuous Electroencephalogram Patients

	Training Set	Test Set
Total number of patients	77	20
Number of female patients	42	11
Age, mean ± sd	57.6 ± 18.0	54.8 ± 21.0
Number of patients with seizures	27	10
Total seizures	265	27
Reason for study, n
Altered mental status	8	5
Witnessed or reported seizure	15	7
Sepsis/toxic/metabolic disorder	11	2
Intracranial hemorrhage	18	3
Neoplasm	9	0
Anoxic brain injury	4	2
Other/unspecified coma	13	1

We used records from 77 patients in the ICU for algorithm cross-validation and training, and a held-out test set of 20 patients who underwent continuous electroencephalogram after algorithm development. The reason for ordering the study was retrospectively collected from the electronic health record as the most direct factor necessitating the study.