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  1. Increased rates of schizophrenia among immigrants : some methodological concerns raised by Danish findings.

    Article - En anglais

    Background

    Several studies during recent years have reported an increased occurrence of schizophrenia in selected immigrant groups.

    However, difficulties in establishing the population denominator for immigrant rates of mental disorder, selective referral for treatment, and other problems may have influenced such results.

    The current study aims at testing empirically the influence of some of these methodological problems.

    Methods

    Using nationwide case register data from Denmark, the diagnosis specific first-admission rates were compared between persons born in Denmark and other countries respectively.

    A case-control design was used to compare schizophrenia risk between different immigrant groups.

    Results

    Incidence rates of mental disorders among non-Danish residents calculated from admission data showed increased rates of schizophrenia (RR 1.7) and non-affective functional psychoses (RR 1.9).

    A case-control analysis utilizing non-psychotic admissions as control for schizophrenic admissions yielded essentially the same result, thus excluding selective referral as the sole explanation of the increased schizophrenia rate.

    However, this was almost exclusively due to increased rates in individuals born in countries neighbouring on Denmark.

    Conclusions

    (...)

    Mots-clés Pascal : Schizophrénie, Psychose, Danemark, Europe, Epidémiologie, Méthodologie, Incidence, Facteur risque, Homme

    Mots-clés Pascal anglais : Schizophrenia, Psychosis, Denmark, Europe, Epidemiology, Methodology, Incidence, Risk factor, Human

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 97-0384191

    Code Inist : 002B18C06A. Création : 12/09/1997.