“…An increased incidence of sleep problems in CWE compared with typically developing children has been reported, 14 whereas daytime sleepiness appears to be common in CWE, and may be caused by underlying sleep disorders. Work where polysomnography has been undertaken is limited, retrospective, 21,22 and in one of the studies might have contained a selection bias because the studies were performed due to concerns with patients' sleep. 17 Using the validated Pediatric Sleep Questionnaire Sleep-Related Breathing Disorder scale (PSQ-SRBD) [18][19][20] to screen for OSA, Jain et al 17 suggest a prevalence of OSA of 30.7% in children with mild epilepsy, rising to 43.8% in severe epilepsy; a retrospective Egyptian study reported OSA as occurring in 11 out of 26 (42%) CWE in whom sleep studies were undertaken.…”