Treatment of disordered sleep and anxiety in primary school-aged children

INTERVENTION: Participants in the treatment condition will receive Sleep Restriction Therapy based on principles of Cognitive Behaviour Therapy for Insomnia. Treatment will be provided by a Psychologist, Clinical Psychologist, or Provisional Psychologist at the Child and Adolescent Sleep Clinic (Flinders University). Sleep Restriction Therapy involves reducing time‐in‐bed to 30 minutes less than the usual average total sleep time. This will be achieved by shifting the child's usual bed time later by 30 minutes. Child participants and their parent/guardian will attend two therapy sessions (one week apart, 1 hour on each occasion) and will implement their given schedule for a period of two weeks. Adherence to the intervention will be monitored using a 7‐day sleep diary and wrist actigraphy CONDITION: Anxiety Chronic Insomnia Disorder PRIMARY OUTCOME: Change in child‐rated total anxiety scale (Spence Children's Anxiety Scale) SECONDARY OUTCOME: Change in number of arousals from REM sleep (as measured by overnight polysomnography recording) Change in sleep efficiency score (based on sleep parameters from sleep diary e.g., time in bed, sleep onset latency, total sleep time, time awake after sleep onset) INCLUSION CRITERIA: Meet diagnostic criteria for Behavioural Insomnia of Childhood according to the International Classification of Sleep Disorders ‐2 manual