Complex sentence: Sleep disorders are commonly reported by parents of children with ASDs, including late sleep onset, early morning awakening, and poor sleep maintenance; sleep disturbances are present in 53--78% of children with ASD.
Split into simpler sentences: Sleep disorders are also commonly reported by parents of children with ASDs, including late sleep onset, early morning awakening, and poor sleep maintenance. Sleep disturbances are present in 53--78% of children with ASD.