Since as many as two thirds of children with ADHD have coexisting conditions such as learning disabilities or depression, assessment must include an evaluation for these disorders as well (American Academy of Pediatrics, 2000). (cectag.com)
If a child continues to respond poorly to treatment, then a reevaluation might be necessary to confirm the diagnosis of ADHD or look for coexisting conditions, such as oppositional defiant disorder, conduct disorder, anxiety, depression, and learning disabilities. (verywellmind.com)