ArticleSocial psychiatry and psychiatric epidemiology2012
Treatment prevalence and incidence of schizophrenia in Quebec using a population health services perspective: different algorithms, different estimates.
Article in Social psychiatry and psychiatric epidemiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 2 of them syntheses that pooled it.
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Who cites it
26 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Prevalence of psychotic disorders and its association with methodological issues. A systematic review and meta-analyses.PloS one · 2018Pooled it
- An evaluation of variation in published estimates of schizophrenia prevalence from 1990─2013: a systematic literature review.BMC psychiatry · 2015Pooled it
- Comparing Administrative Data and Resident Assessment Instrument Data for Mental Health Surveillance in Home Care and Long-Term Care Populations.International journal of methods in psychiatric research · 2026Article
- Shift in sex and age of individuals at a clinical high risk (CHR) for psychosis: relation to differences in recruitment methods and effect on sample characteristics.Schizophrenia (Heidelberg, Germany) · 2025Article
- Sex differences in schizophrenia-spectrum diagnoses: results from a 30-year health record registry.Archives of women's mental health · 2024Article
- Optimal Look-Back Period to Identify True Incident Cases of Diabetes in Medical Insurance Data in the Chinese Population: Retrospective Analysis Study.JMIR public health and surveillance · 2023Article
- 10-Year Trends in Healthcare Spending among Patients with Schizophrenia in Alberta, Canada.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2022Article
- Observational
- Multidimensional analysis of adult patients' care trajectories before a first diagnosis of schizophrenia.Schizophrenia (Heidelberg, Germany) · 2022Article
- The Incidence of Psychotic Disorders and Area-level Marginalization in Ontario, Canada: A Population-based Retrospective Cohort Study.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2022Article
- Urbanicity, Schizophrenia and Equitable Specialist Services Allocation.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2022Article
- Association between mental illness and COVID-19 susceptibility and clinical outcomes in South Korea: a nationwide cohort study.The lancet. Psychiatry · 2020Article
- The clinical course of schizophrenia in women and men-a nation-wide cohort study.NPJ schizophrenia · 2020Article
- Sex-related differences in prevalence, treatment and outcomes in patients with atrial fibrillation.Internal and emergency medicine · 2020Article
- Annual Prevalence and Incidence of Schizophrenia and Similar Psychotic Disorders in the Republic of Korea: A National Health Insurance Data-Based Study.Psychiatry investigation · 2020Article
- Canadian Practice Guidelines for Comprehensive Community Treatment for Schizophrenia and Schizophrenia Spectrum Disorders.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2017Review
- Computing disease incidence, prevalence and comorbidity from electronic medical records.Journal of biomedical informatics · 2016Article
- Predicting chronic benzodiazepine use in adults with depressive disorder: Retrospective cohort study using administrative data in Quebec.Canadian family physician Medecin de famille canadien · 2016Article
- A Surveillance System to Monitor Excess Mortality of People With Mental Illness in Canada.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2015Article
- Incidence of psychotic disorders among first-generation immigrants and refugees in Ontario.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2015Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeUsing a population health services perspective, this article defines and assesses an efficient criteria-based algorithm to identify treatment prevalent and incident cases of schizophrenia. We refer here "treatment" prevalence and incidence since its evaluation depends on a patient receiving a health care service with a diagnosis of schizophrenia.
methodsA population-based cohort study was conducted among all adults having a hospital discharge or a physician claim for schizophrenia in the public health plan databases between January 1996 and December 2006. Four algorithms to characterize patients with schizophrenia were defined. To identify treatment incident cases in 2006, we removed from the treatment prevalent pool patients with a previous record of schizophrenia between 1996 and 2006 (10-year clearance period). Using this 10-year period as reference, Kappa coefficients (KC) and positive predictive values (PPV) were calculated to determine the "optimal" length of clearance period to identify incident cases.
resultsThe lifetime treatment prevalence and incidence of schizophrenia varied from 0.59 to 1.46% and from 42 to 94 per 100,000, respectively. When compared to the 10-year clearance period, the KC is excellent in a clearance period of 6-7 years. To achieve a PPV of 90%, a clearance period of 7-8 years would be necessary.
conclusionsWith an appropriate algorithm, treatment prevalence and incidence of schizophrenia can be conveniently estimated using administrative data. These estimates are a vital step toward appropriate planning of services for schizophrenia.
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