Though it is never too late to intervene, researchers warn that if by age eight a child has not learned ways other than coercion to meet his social goals, he has a high chance of continuing with antisocial behavior throughout his lifetime.
For those adolescents who have both AD/HD and a conduct disorder, up to 25 percent go on to develop antisocial personality disorder and the criminal behavior, substance abuse, and high rate of suicide attempts that are symptomatic of it.
Exaggeration and embellishment when relating incidents or telling stories, and the so-called "white lies," told to avoid disappointing or hurting others feelings, do not have the negative, antisocial consequences of serious lying.
Although antisocial personality disorder is only diagnosed in people over age 18, the symptoms are similar to those of conduct disorder, and the criteria for diagnosis include the onset of conduct disorder before the age of 15.
Multiple risk factors for development and persistence of antisocial behaviors include genetic, neurobiological, and environmental stressors beginning at the prenatal stage and often continuing throughout the childhood years.