This is another DSM-IV-TR Mental Disorder diagnosis that is commonly given to children. The DSM says that its prevelence has been increasing for a few decades now and that up to 10% of kids, mostly boys in “urban settings”, have it. It’s a pretty serious label to give a kid. It’s linked with suicide, homicide, various criminal acts, and is thought of as a precursor to Antisocial Personality Disorder. Here are the criteria, quoted word-for-word from the DSM-IV-TR (pp. 98-99):

Diagnostic criteria for Conduct Disorder

A. A repetitive and persistent pattern of behavior in which the basioc rights of others or major age-appropriate societal norms or rules are violated, as manifested by the presence of three (or more) of the following criteria in the past 12 months, with at least one criterion present in the past 6 months.

Aggression to people and animals

(1) often bullies, threatens, or intimidates others

(2) often initiates physical fights

(3) has used a weapon that can cause serious physical harm to others (e.g., a bat, brick, broken bottle, knife, gun)

(4) has been physically cruel to people

(5) has been physically cruel to animals

(6) has stolen while confronting a victim (e.g., mugging, purse snatching, extortion, armed robbery)

(7) has forced someone into sexual activity

Destruction of property

(8) has deliberately engaged in fire setting with the intention of causing serious damage

(9) has deliberately destroyed others’ property (other than by fire setting)

Deceitfulness or theft

(10) has broken into someone else’s house, building, or car

(11) often lies to obtain goods or favors or to avoid obligations (i.e., “cons” others)

(12) has stolen items of nontrivial value without confronting a victim (e.g., shoplifting, but without breaking and entering; forgery)

Serious violations of rules

(13) often stays out at night despite parental prohibitions, beginning before age 13 years

(14) has run away from home overnight at least twice while living in parental or parental surrogate (or once without returning for a lengthy period)

(15) is often truant from school, beginning before age 13 years

B. The disturbance in behavior causes clinically significant impairment in social, academic, or occupational functioning.

C. If the individual is age 18 years or older, criteria are not met for Antisocial Personality Disorder.

Code based on age at onset:

312.81 Conduct Disorder, Childhood-Onset Type: onset of at least one criterion characteristic of Conduct Disorder prior to age 10 years

312.82 Conduct Disorder, Adolescent-Onset Type: absence of any criteria characteristic of Conduct Disorder prior to age 10 years

312.89 Donduct Disorder, Unspecified Onset: age at onset is not known

Specify severity:

Mild: few if any conduct problems in excess of those required to make the diagnosis and conduct problems cause only minor harm to others

Moderate: number of conduct problems and effect on other intermediate between “mild” and “severe”

Severe: many conduct problems in excess of those required in excess of those required to make the diagnosis or conduct problems cause considerable harm to others

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