Discrimination and delusional ideation.
BACKGROUND
In the UK and The Netherlands, people with high rates of psychosis are chronically exposed to discrimination.


OBJECTIVE
To test whether perceived discrimination is associated longitudinally with onset of psychosis.


METHODS
A 3-year prospective study of cohorts with no history of psychosis and differential rates of reported discrimination on the basis of age, gender, disability, appearance, skin colour or ethnicity and sexual orientation was conducted in the Dutch general population (n=4076). The main outcome was onset of psychotic symptoms (delusions and hallucinations).


RESULTS
The rate of delusional ideation was 0.5% (n=19) in those who did not report discrimination, 0.9% (n=4) in those who reported discrimination in one domain, and 2.7% (n=3) in those who reported discrimination in more than one domain (exact P=0.027). This association remained after adjustment for possible confounders. No association was found between baseline discrimination and onset of hallucinatory experiences.


CONCLUSIONS
Perceived discrimination may induce delusional ideation and thus contribute to the high observed rates of psychotic disorder in exposed minority populations.
Janssen
I
I
Department of Psychiatry and Neuropsychology, Maastricht University, The Netherlands.
Hanssen
M
M
Bak
M
M
Bijl
R V
RV
de Graaf
R
R
Vollebergh
W
W
McKenzie
K
K
van Os
J
J
D000293:Adolescent; D000328:Adult; D015331:Cohort Studies; D003702:Delusions / Q000453:epidemiology / Q000208:ethnology; D005260:Female; D006212:Hallucinations / Q000453:epidemiology / Q000208:ethnology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008913:Minority Groups / Q000523:psychology*; D009426:Netherlands / Q000453:epidemiology; D011287:Prejudice; D011446:Prospective Studies; D011618:Psychotic Disorders / Q000453:epidemiology / Q000208:ethnology*; D012307:Risk Factors