![]() ![]() Since Grant conducted the study among a randomly selected population-based sample, the prevalence rates from her study diverged from those presented in the DSM-IV-TR in some cases.įor instance, according to the DSM-IV-TR, dependent personality disorder is “among the most frequently reported personality disorders encountered in mental health clinics,” the study report pointed out. According to the article, “these findings suggest that many individuals who demonstrate the preoccupation with orderliness, perfectionism, and mental and interpersonal control characteristic of the disorder may be high functioning even in the absence of flexibility, openness, and efficiency.” However, having obsessive-compulsive personality disorder did not correlate with higher disability scores. Grant found that a number of personality disorders-specifically, avoidant, dependent, paranoid, schizoid, and antisocial personality disorders-were associated with significant emotional disability problems with social functioning, and occupational impairment. She also examined the relationship between personality disorders and emotional and social functioning by using the Short Form 12, Version 2 questionnaire. The researchers decided to include the latter three personality disorders in another phase of the study. Grant tested respondents for the following personality disorders: avoidant, dependent, obsessive-compulsive, paranoid, schizoid, histrionic, and antisocial, but excluded borderline, schizotypal, and narcissistic personality disorders due to the large number of symptom items required to diagnose those disorders. In order to receive a personality disorder diagnosis, respondents had to experience the requisite number of symptoms listed in DSM-IV for a personality disorder, and at least one of those symptoms must have caused the person to experience social and/or occupational dysfunction. Interviewers used the NIAAA Alcohol Use Disorder and Associated Disabilities Interview Schedule– DSM-IV Version (AUDADIS) as part of the study. Census Bureau administered the NESARC instrument to 43,093 adults aged 18 and older to assess the prevalence and comorbidity of a number of mental illnesses.Īs part of the survey, interviewers asked respondents a series of questions about how they felt or acted most of the time throughout their lives“ regardless of the situation or whom they were with,” according to the report. The sample researchers used for the 2001-02 NESARC was based on the sampling frame of the Census 2000/2001 Supplemental Survey.Īpproximately 1,800 lay interviewers with the U.S. Grant is chief of the Laboratory Epidemiology and Biometry at the National Institute on Alcohol Abuse and Alcoholism's (NIAAA) Division of Intramural Clinical and Biological Research. Grant said she found a great deal of comorbidity between certain personality disorders, especially avoidant and dependent, and that these data would be published in an upcoming issue of Comprehensive Psychiatry. “We also know they affect the course, severity, and treatment compliance of substance use disorders-what we didn't know was the magnitude of in the population.” “We know that these disorders often co-occur with one another and with Axis I disorders,” primary investigator Bridget Grant, Ph.D., told Psychiatric News. The results of the study appear in the July Journal of Clinical Psychiatry. Other personality disorders affecting substantial numbers of Americans were schizoid (6.5 million), avoidant (4.9 million), histrionic (3.8 million), and dependent (1 million) (see chart).Įxcluded from the study were borderline, schizotypal, and narcissistic disorders. Almost 15 percent of Americans, or 30.8 million adults, meet diagnostic criteria for at least one personality disorder, according to the results of the 2001-02 National Epidemiologic Survey on Alcohol and Related Conditions (NESARC).Īmong several types of personality disorders studied, the most common personality disorder found among American adults in the large, population-based study was obsessive-compulsive personality disorder (7.9 percent, or 16.4 million people), followed by paranoid personality disorder (4.4 percent, or 9.2 million), and antisocial personality disorder (3.6 percent, or 7.6 million).
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