TABLE 1.

Sleep Characteristics of 3- to 4-Year-Old Children

Variablen
Sleep problem (%)32
Severity of sleep problem (%; range 1–7)
 ≤351
 4–538
 6–711
Adult nurses child to sleep (%)22
Sleep site (%)
 Own bed in own room64
 Own bed in sibling’s room22
 Parent’s bed11
 Other3
Evening bedtime (PM)
 Mean (SD)7:53 (42 min)
 Range6:30–10:00
Time taken to fall asleep (min; median [range])15 (1–75)
Number of disturbed nights per week (%)
 022
 111
 216
 318
 4 or more33
Number of wakings per night (%)
 039
 147
 213
 32
Who responds to the waking child overnight (%)
 No one7
 Mother53
 Father17
 Child comes to parent’s bed15
 Other8
Duration of night waking (min)
 Median5
 Range1–30
Morning rising (am)
 Mean6:55 (38 min)
 Range5:30–8:00
Number of naps per day (%)
 052
 148
Length of usual nap (min)
 Mean (SD)80 (30)
 Range25–180
  • SD indicates standard deviation.