Validity of the Personality Diagnostic Questionnaire-4 (PDQ-4+) among mentally ill prison inmates in Singapore.
We examined the validity of the Personality Diagnostic Questionnaire--4+ (PDQ-4+) as a screening instrument for personality disorders among mentally ill prison inmates in Singapore. A total of 313 prison inmates completed the PDQ-4+ and the Structured Clinical Interview for DSM-IV Axis II Disorders (SCID-II). The subjects were 303 (96.8%) males and 10 (3.2%) females with a mean (SD) age of 40.7 (8.8) years. Kappa agreement between PDQ-4+ and SCID-II for the presence at least one personality disorder was moderate with high sensitivity and low specificity. For specific personality disorders and clusters, we found that the PDQ-4+ diagnosed more subjects as having each of the personality disorders than SCID-II with high negative predictive values. The area under the curve indicated moderate discriminatory capabilities. Our results suggest that the PDQ-4+ could be used as a potential screening instrument for personality disorders in prison inmates.
Institute of Mental Health, Buangkok View Medical Park, 10 Buangkok View, 539747 Singpore. Edimansyah_ABDIN@imh.com.sg
Edimansyah
E
Abdin
Kenneth G W W
KG
Koh
Mythily
M
Subramaniam
Meng-En
ME
Guo
Timothy
T
Leo
Colin
C
Teo
Ee Ee
EE
Tan
Siow Ann
SA
Chong
D000328:Adult; D003417:Criminal Psychology; D005260:Female; D006801:Humans; D008297:Male; D028642:Persons with Psychiatric Disorders / Q000523:psychology*; D008875:Middle Aged; D010554:Personality Disorders / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D010556:Personality Tests / Q000592:standards*; D011329:Prisoners / Q000523:psychology*; D011594:Psychometrics; D012372:ROC Curve; D015203:Reproducibility of Results; D012742:Sex Offenses / Q000523:psychology; D012846:Singapore; D011795:Surveys and Questionnaires / Q000592:standards*; D014754:Violence / Q000523:psychology; D055815:Young Adult