Sleep-Disorder Breathing and Sleep Apnea. Some research has shown an association between mild symptoms of ADHD and sleep-disordered breathing, including snoring and obstructive sleep apnea in children and adults. Treating the sleep-related breathing disorders may improve the attention disorder in some children. (One study indicated that such problems are unlikely to be associated with children with moderate to severe ADHD.) [See In-Depth Report #65: Sleep apnea.]
Other Diagnoses
Tourette Syndrome and Other Genetic Disorders. Several genetic disorders cause symptoms resembling ADHD, including fragile X and Tourette syndrome. About 50% of those with Tourette syndrome also have ADHD, and some of the treatments are similar.
Other Medical Conditions. A number of medical conditions, including hyperthyroidism and vision problems, can produce ADHD-like symptoms.
Lead. Children who ingest even low amounts of lead may manifest symptoms similar to those of ADHD. A child may be easily distractible, disorganized, and have trouble thinking logically. The major cause of lead toxicity is exposure to leaded paint, particularly in homes that are old and in poor repair.
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