This study attempted to determine the prevalence of dissociative identity d
isorder in the general population. The Dissociative Experiences Scale (DES)
was administered to 994 subjects in 500 homes who constituted a representa
tive sample of the population of Sivas City, Turkey. The mean DES score was
6.7 +/- 6.1 (mean +/- SD). Of the 62 respondents who scored above 17 on th
e DES, 32 (51.6%) could be contacted during the second phase of the study,
They were matched for age and gender with a group of respondents who scored
below 10 on the scale, and the Dissociative Disorders Interview Schedule (
DDIS) was then administered to both groups. Seventeen subjects (1.7%) recei
ved a diagnosis of dissociative disorder according to the structured interv
iew. In the third phase, eight of 17 subjects who had a dissociative disord
er on the structured interview could be contacted for a clinical evaluation
. They were matched with a nondissociative control group and interviewed by
a clinician blind to the structured interview diagnosis. Four of eight sub
jects were diagnosed clinically with dissociative identity disorder, yieldi
ng a minimum prevalence of 0.4%. Dissociative identity disorder is not rare
in the general population. Self-rating instruments and structured intervie
ws can be used successfully for screening these cases. Our data, derived fr
om a population with no public awareness about dissociative identity disord
er and no exposure to systematic psycho-therapy, suggest that dissociative
identity disorder cannot be considered simply an iatrogenic artifact, a cul
ture-bound syndrome, or a phenomenon induced by media influences, Copyright
(C) 1999 by W.B. Saunders Company.