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How common is it?
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0.77% global pooled, ages 3–18; India community estimates ~0.09–0.11%
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Is it more common among children?
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Core diagnostic population
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Are children at higher risk?
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Yes — developmental condition
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How much higher is the risk?
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Global pooled 0.77%
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How often can it be missed?
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Moderate, especially subtler presentations
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Does it show up differently among children?
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Strong Yes
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How might it look different?
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Language/social-communication differences, restricted interests, sensory sensitivities, play/peer differences
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What commonly occurs alongside it?
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ADHD; intellectual disability; epilepsy; anxiety
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What can it be confused with?
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Language disorder; intellectual disability; ADHD; hearing impairment; social communication disorder
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Common screening tool
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Age-appropriate autism screener
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Separate screening tool for children
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M-CHAT-R/F for toddlers; CAST/SRS-2 for older children
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