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IPDE - Extranet Systems - World Health Organization

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28 J. H. Reich and G. de Girolarno<br />

Both Reich er al.Is and Zimmerman and Coryell,12 using the PDQ,<br />

found considerably lower rates, 0.4% and 0.9% respectively. However, the<br />

rates increased to 3.0% when interviews were used, suggesting that selfreports<br />

may underestimate antisocial personality. Maier et a1.,I0 however,<br />

using a structured interview, also found a low rate of 0.2% in Germany.<br />

Interesting results were obtained by Koegel et al.'2 in a survey canied<br />

out among 328 homeless individuals living in the inner city of Los<br />

Angeles, who were administered the DIS, modified for use with a homeless<br />

population. An overall lifetime rate of 20.8% of antisocial PD was<br />

found compared to a rate of 4.7% in the Los Angeles sample in the ECA<br />

study (N = 3055). The risk ratio of having antisocial PD in the homeless<br />

as compared to the ECA sample was 4.4. The difference in rates was<br />

even more striking when the six month prevalence rate was considered.<br />

The rate among the homeless was 17.4% compared to 0.8% in the ECA<br />

sample, for ariskratio of 21.8.<br />

To summarize, antisocial PD seems to have a prevalence of around<br />

3% in the general population, and to be more frequent among males than<br />

females, with sex ratios ranging from 2:l to 7:l. It is also more common<br />

among younger adults, those Living in urban areas, and the lower socioeconomic<br />

classes. People with a diagnosis of antisocial PD are also high<br />

users of medical services.<br />

Reich et al.lS and Baron er al.,14 in their sample of relatives of normal<br />

probands, found no cases of avoidant personality (Table 1). Zimmerman<br />

and Coryell12 reported rates ranging from 0.4% (PDQ) to 1.3% (SIF'D).<br />

The rate reported by Maier er al.lo (1.1%) was comparable to that<br />

obtained by Zimmerman and Coryell12 and by Baron er ol.l4 (1.6%)<br />

among relatives of schizophrenic probands.<br />

Dependent<br />

Reich et al.15 and Zimmerman and C~ryell,~~ using the PDQ, reported rates<br />

of 5.1% and 6.7% respectively (Table 1). However, the rates were lower<br />

when a structured interview was used (SIPD: 1.7%; SCID: 1 .6%).12,L0<br />

Compulsive<br />

The rates of compulsive disorder were comparable in two studie~l~.~~ in<br />

which the PDQ was used (6.4%15 and 4.0%LZ). However, lower rates

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