The option to hug and verbally console the child’s distress is sometimes effective and does not reinforce the behavior unless the parent also yields to demands. But once outbursts begin, I liken them to a bomb going off – there is no intervention possible then. Instead, the task of the family, and over time that of the child, is to recognize and better manage the triggers.
Dr. Ross Greene, in his book, “The Explosive Child: A New Approach for Understanding and Parenting Easily Frustrated, Chronically Inflexible Children,” asserts that the child’s anger and distress can be interpreted as frustration from a gap in skills. This has treatment implications for identifying, educating about, and ameliorating the child’s weaknesses (deficits in understanding, communication, emotion regulation, flexibility or performance; or excess jealousy or hypersensitivity), and coaching parents to recognize, acknowledge, and avoid stressing these areas, if possible. I coach families to give points to the child for progressive little steps toward being able to recognize, verbalize, and inhibit outbursts with a reward system for the points. This helps put the parents and child “on the same team” in working on improving these skills.
Research on children with DMDD indicates that they show less positive affect when winning a “fixed” video game and are less able to suppress negative affect when losing. (Don’t forget to examine the role of real video games as precipitants of tantrums and contingently remove them!) Threshold for upset is lower and the degree of the upsets less well handled by children with DMDD.
In another study, when presented with a series of ambiguous facial expressions, children with DMDD were more likely to see anger in the faces than were controls. One hopeful result was that they could be taught to shift their perceptions significantly away from seeing anger, also reducing irritability and resulting in functional MRI changes. Such hostile bias attribution (tending to see threat) is well known to predispose to aggression. Cognitive behavioral therapy, the most effective counseling intervention, similarly teaches children to rethink their own negative thoughts before acting.
If irritability and rages were not enough, most children with DMDD have other psychiatric disorders; 39% having two, and 51% three or more (J Child Adolesc Psychopharmacol. 2013 Nov;23[9]:588-96). If not for the DMDD diagnosis, 82% would meet criteria for oppositional defiant disorder (ODD). The other common comorbidities are attention-deficit/hyperactivity disorder (ADHD) (74.5%), anxiety disorders (49.0%), and depression that is not major depressive disorder (MDD)(33.3%). When MDD is present, that diagnosis takes precedence. One cannot diagnose ODD, intermittent explosive disorder, or bipolar disorder along with DMDD, conditions from which it is intended to differentiate. Each of these comorbid disorders can be difficult to manage alone much less in combination, making DMDD a disorder deserving diagnosis and treatment by a mental health professional.
One of the main reasons DMDD was created is that children with these features go on to depressive or anxiety disorder in adolescence, not bipolar disorder.
While there is no treatment specific to DMDD, the depression component and prognosis suggest use of SSRIs, in addition to psychosocial therapies, and stimulants for the comorbid ADHD. Unfortunately, these two classes of medication are relatively contraindicated in bipolar disorder because they can lead to treatment-induced episodic mania (TEM). TEM occurs twice as often with antidepressants compared with stimulants (44% vs. 18%) in children with bipolar disorder (J Affect Disord. 2004 Oct 1;82[1]:149-58). Getting the diagnosis correct is, therefore, of great importance when medication is considered.
Approaches such as behavior modification, family therapy, and inpatient treatment can be effective for chronic irritability and aggression. Stimulant treatment of comorbid ADHD can decrease aggression and irritability. Alpha agonists such as guanfacine or clonidine also can help. In cases of partial improvement, adding either risperidone or divalproex may further decrease aggression in ADHD. In refractory aggression, risperidone has the best evidence. The Affective Reactivity Index or Outburst Monitoring Scale can be helpful in assessing severity and monitoring outcomes.
While a prognosis for depression rather than bipolar disorder sounds like a plus, in a longitudinal study, adults who had DMDD as children had worse outcomes, including being more likely to have adverse health outcomes (smoking, sexually transmitted infection), police contact, and low educational attainment, and being more likely to live in poverty, compared with controls who had other psychiatric disorders. While DMDD is a new and different diagnosis, it is similar to bipolar in having a potential course of life disruption, dangerous behaviors, suicide risk, and hospitalization.
Dr. Howard is assistant professor of pediatrics at the Johns Hopkins University, Baltimore, and creator of CHADIS (www.CHADIS.com). She had no other relevant disclosures. Dr. Howard’s contribution to this publication was as a paid expert to Frontline. E-mail her at pdnews@frontlinemedcom.com.