Prevalence of Sleep Disorders in Children with Cerebral Palsy; A Questionnaire-based Observational Study.

Background: Cerebral palsy (CP), the most common developmental disorder, has many comorbidities (epilepsy and behavioral issues). Sleep disturbances are common complaints of parents and are usually neglected in pediatric populations in comparison to other well-documented co-morbidities of CP but may have a significant effect on the quality of life of children and their parents. Objective: To study the prevalence and pattern of sleep disorders (SD) in children with CP. Study Design: Questionnaire-based observational study. Setting: Pediatric tertiary care center. The study was done over 6 months. Participants: In total, 200 children with CP between the ages of 1 year to 14 years were included in the study by convenience sampling. Co-morbid health problems involving cardiorespiratory system, other illness (e.g. epilepsy and gastroesophageal reflux disease), or children on anticonvulsant medications altering sleep patterns were excluded. Intervention: The Sleep Disturbance Scale for Children (SDSC) was administered to assess the presence of pathological sleep and type of SD ranging between Disorders of Initiation and Maintenance of Sleep (DIMS), Sleep Breathing disorders (SBD), Disorders of Arousal (DA), Sleep-Wake Transition Disorders (SWTD), Disorders of Excessive Somnolence (DES), and Sleep Hyperhydrosis (SHY). Main Outcome Measures: Sixty-two percentage of children (124) had a pathological total sleep score (score >39). Results: DIMS are the most common, occurring in 78.2% of subjects with a pathological sleep score (score >39). Quadriplegics [n = 96, mean score = 49.86(16.38)] and GMFCS V [n = 19, mean score = 58.00(17.10)] are most severely affected. Conclusion and Discussion: Children with CP have under-reported SD and DIMS is the most common type of SD. There is a linear correlation between the extent of topographical and motor afflictions and SD.