What is Known:
• Intelligence scores of school-aged PCD patients are similar to healthy subjects despite their higher internalizing problem scores on Child Behavior Checklist (CBCL).
• School-aged PCD patients exhibit higher hyperactivity and inattention findings.
What is New:
• Positive screening for developmental delay in communication, problem-solving and fine motor skills is more common in preschool-aged PCD patients.
• Preschool-aged PCD patients screened positive for developmental delay in more than one domain have higher externalizing and total problem scores on CBCL.