Dementia, poor mental status during electroencephalogram (EEG), chronic focal abnormalities on neuroimaging, cardiac arrest, and chronic obstructive pulmonary disease (COPD) were independently associated with increased in-hospital mortality in patients with generalized periodic discharges (GPDs), according to an analysis of 113 patients at 3 hospitals. To determine the prognostic significance of GPDs observed during EEGs, Jadeja et al reviewed EEG tracings of the patients, of whom there were 60 inpatient deaths (53.1%).
Jadeja N, Zarnegar R, Legatt AD. Clinical outcomes in patients with generalized periodic discharges. Seizure. 2017; 45:114-118.