[Evaluation of the incidence of hospitalization of patients with psychotic disorders].
The aim of this study was to assess the administrative incidence of psychotic disorders, i.e. the incidence of first hospitalization for such disorders. Consecutively first-admitted patients hospitalized in 4 departments of Bordeaux's psychiatric hospital were included. Patients fulfilled the following inclusion criteria: no previous psychiatric hospitalization; aged 60 years or less; at least one overt psychotic symptom; clear consciousness. Patients were drawn from a 250,000 inhabitants urban catchment area, with an at risk population of 161,698 inhabitants. DSM IV diagnoses were made using the Mini International Neuropsychiatric Instrument (MINI) as well as all available information collected from the patient, the relatives, and from any other informant. A complementary study was performed in the private psychiatric institutions and in the military Hospital of Bordeaux in order to assess the representativeness of the patients hospitalized in the state hospital. 59 patients were included during one year in the state hospital. The raw incidence rate was 0.37 per 1,000 (95% CI; 0.28-0.46). We used a direct standardization on age to calculate the incidence rates ratio to gender. Men were over-representated in the sample, with a standardized incidence ratio in men compared to women equal to 1.87 (95% CI; 1.25-2.8). Psychotic mood disorders had the highest incidence, with an incidence rate equal to 0.15 per 1,000 inhabitants (95% CI; 0.09-0.21). The incidence rate of DSM IV schizophrenia was lower than that of psychotic mood disorders, and was equal to 0.13 per 1,000 (95% CI; 0.08-0.18). Several studies conducted in European and North-American countries have recently suggested that the incidence of schizophrenia may have decreased in the past decades. Since few French studies on the incidence of such disorders have been carried out, it is not possible to assess whether the incidence of schizophrenia is or not decreasing in France. Further studies on the incidence of psychotic disorders are required in other French regions in order to assess the reproductibility of our results, and to have reference data on the incidence of psychotic disorders in the nineties.
Bergey
C
C
Service Universitaire de Psychiatrie, Université Victor Ségalen Bordeaux.
Verdoux
H
H
Assens
F
F
Abalan
F
F
Liraud
F
F
Gonzales
B
B
Beaussier
J P
JP
Gaussares
C
C
Etchegaray
B
B
Bourgeois
M
M
Salamon
R
R
D000293:Adolescent; D000328:Adult; D005260:Female; D005602:France / Q000453:epidemiology; D006760:Hospitalization; D006778:Hospitals, Psychiatric; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000175:diagnosis / Q000453:epidemiology* / Q000534:rehabilitation*; D012189:Retrospective Studies