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Question: What is the prevalence of these parasomnias? -sleepwalking, night terrors and nightmares?

Answer: According to the DSM-IV TR, the prevalence of nightmares is between 10-50% for children between 3-5 years. For young adults, about 3% report having frequent nightmares. About 50% of all adults will report having an occasional nightmare. The actual prevalence for nightmare disorder is not known. The estimated prevalence for sleep terror disorder is about 1-6% for children and less than 1% for adults. The prevalence of sleepwalking disorder is about 1-5%

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