Objective: Postictal generalized EEG suppression (PGES) has been proposed as a neurophysiological marker for sudden unexpected death in epilepsy (SUDEP).  If PGES is a marker of potentially fatal seizures, it is critical to identify clinical features that distinguish people with epilepsy that are prone to PGES. Methods: A retrospective review of vEEG at the Hospital for Sick Children (2009-2011) was performed, to identify episodes of PGES as defined by Surges et al, 2011, along with clinical features of pediatric patients at the time of PGES recording. Results: 26 children (62%; 16 male) demonstrated 49 seizures with PGES (37%) from a total of 134 seizures. Duration of PGES ranged 2-54 sec (mean 30 sec). 42 of 48 (88%) seizures associated with PGES were generalized tonic clonic seizures (GTCS). Duration of 42 PGES with GTCS (mean 35 sec) was significantly longer than that of 6 PGES without GTCS (mean 9.6 sec; p <0.005). Longer PGES duration significantly correlated with lower E-Chess score, a marker of epilepsy severity (R = 0.63; p < 0.001) and with less lifetime use of AEDs (R = 0.40; p < 0.05). 8 children had global developmental delay (31%) and had a shorter PGES duration (mean 17.7 sec) compared to those children with normal development (mean 37.7 sec; p<0.005). Conclusion: Longer duration of PGES in children significantly correlates with GTCS, lower E-Chess score, less lifetime use of AEDs and normal development. The latter three findings suggest that PGES is more common in pediatric patients with less severe epilepsy.