Table 3. Visually classified EEG patterns (Median [Min–Max]).

EEG pattern	n	Time to onset (s)	Number of seconds occupied by pattern
Slow delta (DS)	38	78.5 [17–171]	25.5 [3–190]
Delta with spikes (DSP)	9	127 [53–276]	17 [6–37]
Rhythmic polyspikes (PSR)	10	144 [95–350]	23 [5–118]
Periodic epileptiform discharges (PED)	4	230 [127–410]	12.5 [4–30]