Concept: Psychotic Disorders - Measuring Prevalence

Introduction

This concept describes how psychotic disorders have been defined in MCHP research and provides information about the findings of this research.

Data Sources

Data for defining a psychotic episodes can be found in the:


• Hospital Abstracts data;
  
• Medical Services / Physician Claims data; and
  
• Mental Health Management Information System (MHMIS) data

Psychotic Disorder Definition

The following are definitions for psychotic disorders that have been used in MCHP research over time.

Tataryn et al. (1994)

In The Utilization of Medical Services for Mental Health Disorders, Manitoba: 1991 - 1992 deliverable by Tataryn et al. (1994), they classified mental health disorders into three broad categories: psychotic disorder, non-psychotic disorder and other mental health disorder. They defined psychotic disorders, including schizophrenic disorders, paranoid conditions and major depressions, as mental health disorders that are typically chronic or persistently recurrent and are associated with serious social and occupational disability.

This research defined psychotic disorders using ICD-9-CM codes ranging from 295-299 in order to calculate prevalence and utilization estimates. The following data bases were used to identify psychotic disorders: Hospital Abstracts, Medical Services / Physician Claims, and the Mental Health Management Information System (MHMIS).

For more information:


• for definitions of the other mental health categories used in this research, please see the non-psychotic disorders and other mental health disorder glossary terms below.
  
• for more details already documented on this research, see section 2 - The Utilization of Medical Services for Mental Health Disorders Manitoba: 1991-1992 in the Mental Health Disorder / Mental Health Illness Classification concept.

Chartier et al. (2016) and Brownell et al. (2020)

In The Mental Health of Manitoba's Children deliverable by Chartier et al. 2016, and The Overlap Between the Child Welfare and Youth Criminal Justice Systems: Documenting "Cross-Over Kids" by Brownell et al. (2020) they used the following algorithm to define psychotic disorders:


• one or more hospitalizations with a diagnosis of psychotic disorders, using either:
  
  
  • ICD-9 codes: 295 (schizophrenic disorders) or 297 (delusional disorders) or 298 (other nonorganic psychoses); OR
    
  • ICD-10 codes: F11.5, F12.5, F13.5, F14.5, F15.5, F16.5, F17.5, F18.5, F19.5 (psychotic disorders due to opioids, cannabinoids…etc.), F20 (schizophrenia), F22 (delusional disorder), F23 (acute and transient psychotic disorders), F24 (induced delusional disorder), F25 (schizoaffective disorders), F28 (other nonorganic psychotic disorders), F29 (unspecified nonorganic psychosis); OR
  
  
• one or more physician visits with a diagnosis of psychotic disorders using ICD-9 codes: 295 (schizophrenic disorders) or 297 (delusional disorders) or 298 (other nonorganic psychoses)

NOTE: Data from the MHMIS was not used in this definition of psychotic disorders.

Research Findings

In Chartier et al. (2016), they reported the four-year diagnostic prevalence of psychotic disorders over two time periods for adolescents aged 13 to 19 by Health Region, Winnipeg Community Area, sex, and income quintile. For more information, see the section titled Psychotic Disorders in this on-line deliverable.

Chartier et al. (2018) and Nickel et al. (2020)

In the Mental Illness Among Adult Manitobans deliverable by Chartier et al. 2018, and the Methamphetamine use in Manitoba-A Linked Administrative Data Study deliverable by Nickel et al. 2020 , they used the following algorithm to define psychotic disorders:


• one or more hospitalizations with a diagnosis of psychotic disorders, using either:
  
  
  • ICD-9 codes: 295 (schizophrenic disorders) or 297 (delusional disorders) or 298 (other nonorganic psychoses); OR
    
  • ICD-10 codes: F11.5, F12.5, F13.5, F14.5, F15.5, F16.5, F18.5, F19.5 (psychotic disorders due to opioids, cannabinoids…etc.), F20 (schizophrenia), F22 (delusional disorder), F23 (acute and transient psychotic disorders), F24 (induced delusional disorder), F25 (schizoaffective disorders), F28 (other nonorganic psychotic disorders), F29 (unspecified nonorganic psychosis); OR
  
  
• one or more physician visits with a diagnosis of psychotic disorders using ICD-9 codes: 295 (schizophrenic disorders) or 297 (delusional disorders) or 298 (other nonorganic psychoses)

Research Findings

In Chartier et al. 2018 , the reseacrh reported the five year diagnostic prevalence of psychotic disorders among adults from 2010/11 to 2014/15 by Health Region, Health Region District, Winnipeg Neighbourgood Cluster, Age and Sex and Income Quintile. For more information, see the section titled Psychotic Disorders in the online deliverable.

In Nickel et al. 2020 , they used administrative data to describe the incidence rate of methamphetamine use in Manitoba from 2013 to 2018. The findings are illustrated by geographic distribution, sociodemographic characteristics, and mental health comorbidities. For more information, see Psychotic Disorders in the 5 Years Before First Contact and Psychotic Disorders in the Year After First Contact in the online deliverable.