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. 2006 Jun 26;77(9):1040–1042. doi: 10.1136/jnnp.2005.084871

Table 1 Characteristics of each recording grouped by protocol.

DI‐EEG (n = 94) r–EEG (n = 99) SD‐EEG (n = 92)
Median duration (min) 41 21.8 40.5
Range 18‐60 15‐42 10‐57
IQR 37–44.5 19.5–23 36–44
Fast activity 42% 25% 22%
Deepest sleep stage attained (%)
 Awake 11 53 5
 Stage 1 22 21 13
 Stage 2 61 25 60
 Stage 3 6 0 14
 Stage 4 1 0 8

DI‐EEG, EEG during drug‐induced sleep; EEG, electroencephalography; IQR, interquartile range; r‐EEG, routine EEG; SD‐EEG, EEG after sleep deprivation.