What Is ADHD Combined Type?
What Is ADHD?
What Is ADHD?
Attention deficit hyperactivity disorder (ADHD) is a common neurobehavioral disorder typically diagnosed in children. However, adults may experience symptoms too. The most common problems associated with ADHD are an inability to control behavior, inability to focus, and overactive behavior.
According to the American Psychiatric Association (APA), 9 percent of school-aged children have ADHD. Four percent of U.S. adults have ADHD.
The Types of ADHD
The Types of ADHD
ADHD has three subtypes:
- predominately hyperactive-impulsive
- predominantly inattentive
- combined hyperactive-impulsive and inattentive
People with combined type ADHD experience six or more symptoms of predominantly inattentive ADHD and six or more symptoms of predominantly hyperactivity-impulsivity ADHD. According to the National Institute of Mental Health (NIMH), most children have combined type ADHD.
Inattentiveness symptoms of ADHD include:
- struggling to follow instructions
- appearing to not listen when spoken to
- becoming confused easily
- daydreaming or inability to pay attention
- becoming easily distracted
- having difficulty following through on tasks or assignments
- losing or forgetting things or events
Hyperactivity and Impulsivity Symptoms
Hyperactivity and Impulsivity Symptoms
The most common symptoms of hyperactivity include:
- fidgeting or squirming
- being unable to remain seated for long periods of time
- talking nonstop
- jumping around a room
The most common symptoms of impulsivity include:
- saying inappropriate things without thinking
- being impatient or rude
- interrupting or butting into other peoples’ conversations
- having difficulty waiting your turn
A person with combined type ADHD experiences six or more inattentiveness symptoms and six or more hyperactivity/impulsivity symptoms.
Science has not found a cause for ADHD. However, many studies have found potential factors that can influence a person’s likelihood to develop the condition. For example, environmental factors may play a role.
Changes in utero may also have an effect. According to one study, women who smoked and drank alcohol while pregnant were more likely to have children with ADHD. Another study published in Pediatrics found that children with prenatal exposure to lead were more likely to develop ADHD.
Genes may also play a role. A study from the University of North Carolina at Chapel Hill found that ADHD may run in families. Still, no clear cause is known.
Risk factors for all subtypes of ADHD include:
- Inherited genes. A study published in JAMA Psychiatry shows that several genes may make people more likely to develop ADHD.
- Environmental factors. Exposure to lead may increase a child’s risk for ADHD.
- Brain injury. A small number of children who suffer a traumatic brain injury may develop ADHD.
- A mother’s alcohol and tobacco use during pregnancy. A study by the Washington University School of Medicine found that mothers who smoke while pregnant increase their child’s risk for developing ADHD. Women who drink alcohol and use drugs during pregnancy also put their child at risk for the disorder.
- Low-birth weight or premature delivery. According to a study in the journal Pediatrics, babies born before their due date are more likely to have ADHD when they’re older.
- Gender. The Centers for Disease Control and Prevention (CDC) states that boys are more than twice as likely to develop ADHD than girls.
No single test can diagnose ADHD. Initially, your child’s doctor will conduct a thorough medical examination to rule out other diagnoses that mimic ADHD such as a learning disability or anxiety disorder.
Then, they’ll monitor your child for the symptoms associated with the subtypes of ADHD. This may require observing your child during the day or asking teachers and family members to provide behavior descriptions.
Taking all of these things into consideration, your doctor may arrive at an ADHD diagnosis.
All subtypes of ADHD can be treated with a combination of medicine and therapy.
Medicine. Doctors most commonly prescribe psychostimulants to ease the behavioral signs of ADHD and make focusing on everyday tasks easier.
Therapy. Psychotherapy and behavioral therapy can help a child or adult learn to manage the symptoms of ADHD. This includes occupational therapy, which will teach them how to complete schoolwork or job tasks. Parents may also use family therapy to learn to cope and effectively manage their child’s symptoms of ADHD.
- Attention Deficit Hyperactivity Disorder (ADHD). (2008). National Institute of Mental Health. Retrieved June 7, 2013 from http://www.nimh.nih.gov/health/publications/attention-deficit-hyperactivity-disorder/index.shtml.
- Attention deficit hyperactivity disorder. (2013, 23 March). National Library of Medicine. Retrieved June 7, 2013 from http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002518/.
- Attention-Deficit/Hyperactivity Disorder (ADHD) – Facts About ADHD. (2013, 18 Apr). Centers for Disease Control and Prevention. Retrieved June 7, 2013 from http://www.cdc.gov/ncbddd/adhd/facts.html.
- Attention-deficit/hyperactivity disorder (ADHD) in children. (2013, 5 Mar). Mayo Foundation for Medical Education and Research. Retrieved June 7, 2013 from http://www.mayoclinic.com/health/adhd/DS00275.
- ADHD. (n.d.) American Psychiatric Association. Retrieved June 7, 2013 from http://www.psychiatry.org/adhd.
- de Zeeuw, P, et al. Prenatal exposure to cigarette smoke or alcohol and cerebellum volume in attention-deficit/hyperactivity disorder and typical development. Translational Psychiatry. (2012, Mar 6). 2(84). Retrieved July 4, 2013 from http://www.ncbi.nlm.nih.gov/pubmed/22832850.
- Froehlich TE, et al. Association of tobacco and lead exposures with attention-deficit/hyperactivity disorder. Pediatrics. (2009 Dec). 124(6):1054–63. Retrieved July 4, 2013 from http://pediatrics.aappublications.org/content/124/6/e1054.
- Gizer, IR, et al. Candidate gene studies of ADHD: a meta-analytic review. Human Genetics. (2009 Jul). 126(1):51-90. Retrieved July 4, 2013 from http://www.ncbi.nlm.nih.gov/pubmed/19506906.
- Lindstrom, K., et al. Preterm Birth and Attention-Deficit/Hyperactivity Disorder in Schoolchildren. Pediatrics. 2011, May 1; 127(5): 858-865. Retrieved June 14, 2013 from http://pediatrics.aappublications.org/content/127/5/858.
- Neuman, RJ., et al. Prenatal smoking exposure and dopaminergic genotypes interact to cause a severe ADHD subtype. Biological Psychiatry. 2007 Jun 15;61(12):1320-8. Retrieved June 14, 2013 from http://www.ncbi.nlm.nih.gov/pubmed/17157268.
- Nigg, JT. Attention-Deficit/Hyperactivity Disorder: Endophenotypes, Structure, and Etiological Pathways. Current Directions in Psychological Science. 2010 Feb;19(1): 24-29. Retrieved June 14, 2013 from http://cdp.sagepub.com/content/19/1/24.short.
- Shaw P, et al. Polymorphisms of the dopamine D4 receptor, clinical outcome and cortical structure in attention-deficit/hyperactivity disorder. Archives of General Psychiatry, 2007 Aug; 64(8):921-931. Retrieved June 7, 2013 from http://archpsyc.jamanetwork.com/article.aspx?articleid=482389