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Do psychiatric registries include all persons with schizophrenia in the general population? A population-based
Mark Weiser1, Nomi Werbeloff, Bruce P Dohrenwend
1Department of Psychiatry, Sheba Medical Center, Tel-Hashomer, Israel. mweiser@netvision.net.il
Schizophrenia Research
|January 21, 2012
Summary
Psychiatric hospitalization registries capture most schizophrenia cases, but lifetime prevalence estimation is complex. Some individuals may not be hospitalized, and differentiating schizophrenia from other disorders can be challenging.
Area of Science:
- Psychiatry
- Epidemiology
- Public Health
Background:
- Psychiatric hospitalization registries are crucial for studying schizophrenia incidence and prevalence.
- A key assumption is that most individuals with schizophrenia will experience at least one hospitalization.
Purpose of the Study:
- To assess the utility of psychiatric hospitalization registries in capturing schizophrenia cases.
- To evaluate the accuracy of lifetime prevalence rates derived from hospitalization data.
Main Methods:
- An epidemiological survey screened 4914 Israel-born individuals aged 25-34 in the 1980s.
- Survey diagnoses were linked with the Israeli National Psychiatric Hospitalization Registry 24 years later.
Main Results:
- 93% of individuals diagnosed with schizophrenia in the survey were found in the hospitalization registry.
- An additional 1.0% of the cohort were diagnosed with schizophrenia in the registry but not in the initial survey, often with prior non-psychotic diagnoses.
- Accepting all registry diagnoses at face value suggested a 1.8% lifetime prevalence rate.
Conclusions:
- Psychiatric hospitalization registries are effective in identifying the majority of schizophrenia cases diagnosed in early adulthood.
- Estimating lifetime schizophrenia prevalence using hospitalization data alone is problematic due to asymptomatic cases, premorbid disorders, and diagnostic ambiguities.
- Generalizability of findings depends on variations in psychiatric service availability and hospitalization policies across different regions.
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