The CSHQ is a retrospective, parent questionnaire that has been used in a number of studies to assess sleep patterns and problems in children aged 4 to 12 years. The CSHQ focuses on sleep disorders common to this age group, in 3 domains: Dyssomnias (diffi culty getting to sleep or staying asleep), Parasomnias (sleepwalking/talking, night terrors, bedwetting, restless leg syndrome, etc), and Sleepdisordered breathing. Items are rated on a 3-point scale: “usually” if the sleep behavior occurs more than 4 times per week, “sometimes” if it occurs 2 to 4 times a week, and “rarely” if it occurs 0 to 1 time per week. The 50 items were conceptually grouped into the following sleep domains: Sleeping arrangement, Sleeping duration, Sleep routine, Sleep resistance, Night awakenings, Parasomnias, Sleep-disordered breathing, Morning behavior, Daytime behaviour and Parental perception.