Table 2.

Descriptive statistics of sleep variables, means reported. SD—standard deviation.

Sleep Variables	ADHD	Controls
Sleep Onset Latency (SD)
school days	49 min (33 min)	29 min (18 min)
free days	46 min (29 min)	31 min (21 min)
Total Counts (SD)
school days	151,214 (76,962)	91,198 (45,602)
free days	182,795 (113,454)	121,787 (62,562)
Sleep Efficiency (SD)
school days	74% (7%)	79% (7%)
free days	72% (8%)	76% (6%)
Sleep Deficit (SD)	+/−2 h Normal	+/−2 h Normal
school days	2 h 32 min (42 min)	2 h 3 min (49 min)
free days	2 h 22 min (56 min)	2 h 6 min (44 min)
Total Sleep Time (SD)
school days	7 h 25 min (54 min)	7 h 58 min (48 min)
free days	7 h 37 min (53 min)	7 h 56 min (42 min)
Sleep Onset Time (SD)
school days	9:27 p.m. (46 min)	9:20 p.m. (48 min)
free days	10:19 p.m. (52 min)	10:06 p.m. (57 min)