In a study of 120 adult patients with status epilepticus (SE), researchers found that cEEG background information (posterior dominant rhythm and sleep patterns) to be more predictive of clinical outcome than seizures or rhythmic and periodic patterns. Of the EEG features studied, only two were significantly correlated with outcome: absence of a posterior dominant rhythm for mortality and changes in stage II sleep patterns for complete recovery.
Alvarez V, Drislane FW, Westover MB, Dworetzky BA, Lee JW. Characteristics and role in outcome prediction of continuous EEG after status epilepticus: a prospective observational cohort study. Epilepsia. 2015;56(6):933-941.