Table 2.

EEG findings.

Variables	Results
Number of recorded EEGs	198 (1–10)
Mean number of recorded EEGs ± SD	2.9 ± 1.9
Age at the first EEG (years)	7.7 ± 7.8 (0.1–33)
Age at the last EEG (years)	10.6 ± 8.3 (0.1–33)
EEG type
Wakefulness  Wakefulness and sleep	92 (46.5%) 106 (53.5%)
Background activity at the last EEG
Slow  Normal	0 (0%) 74 (100%)
Abnormalities  Middle-anterior spikes  Middle-posterior spikes  Focal slow waves	19 (25.7%)
	5 (26.3%)
	12 (63.2%)
	2 (10.5%)

Categorical variables are reported as frequency; quantitative variables are reported as mean ± SD (range).