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Name
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Repeat Hospital Stays for Mental Illness
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Short/Other Names
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Patients With Repeat Hospitalizations for Mental Illness

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Description
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Risk-adjusted percentage of individuals who had three 3 or more episodes of care for a mental illness among all those who had at least one episode of care for a mental illness in general or psychiatric hospitals within a given year.

Note
For further details, please see the General Methodology Notes.

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Interpretation
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Lower rates are desirable.
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HSP Framework Dimension
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Health System Outputs: Person-centred

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Areas of Need
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Living With Illness, Disability or Reduced Function

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Geographic Coverage
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All provinces/territories

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Reporting Level/Disaggregation
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National, Province/Territory, Region, Neighbourhood Income Quintile

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Indicator Results
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Accessing Indicator Results on Your Health System: In Depth

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HTML Table
iddescAndCalRegion
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Description
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Risk-adjusted percentage of individuals who had three 3 or more episodes of care for a mental illness among all those who had at least one episode of care for a mental illness in general or psychiatric hospitals within a given year.

Note
For further details, please see the General Methodology Notes.

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Calculation: Description
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Wiki Markup
(Total number of individuals who had at least
three
 3 episodes of care for a mental illness \[repeat hospitalizations\] in a
one
 1-year period
÷
 ÷ Total number of individuals who had at least one episode of care for a mental illness in a
one
 1-year period)
×
 × 100

The risk-adjusted percentage for each region was calculated by dividing the observed number of individuals with repeat hospitalizations in each region by the expected number of individuals with repeat hospitalizations in the region and multiplying by the Canadian average percentage of individuals with repeat hospitalizations percentage.

Unit of Analysis : Episode of carePatients

An episode of care refers to all contiguous inpatient hospitalizations in general and psychiatric hospitals and all day surgery visits regardless of diagnoses. To construct an episode of care, a transfer is assumed to have occurred if the following condition is met:

  • Admission to a general/psychiatric hospital or day surgery facility occurs on the same day as discharge from another general/psychiatric hospital or day surgery facility
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Calculation: Geographic Assignment
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Place of residence

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Calculation: Type of Measurement
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Percentage or proportion

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Calculation: Adjustment Applied
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The following covariates are used in risk adjustment:
For a detailed list of covariates used in the model, please refer to the Model Specification document.

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Calculation: Method of Adjustment
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Logistic regression

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Denominator
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Description:
Total number of individuals who had at least one episode of care for a mental illness in a one1-year period. The most recent episode of care in a fiscal year is the index episode of care.
Inclusions:
1. A mental illness is identified by DSM-IV/DSM-5 diagnostic category in Ontario Mental Health Reporting System (OMHRS) data or by the most responsible diagnosis (MRDx) ICD-10-CA codes in Discharge Abstract Database (DAD)/Hospital Morbidity Database (HMDB) data

2. Diagnosis codes for mental illness:

i. Substance-related and addictive disorders: ICD-10-CA: F10–F19, F55, F63.0; DSM-IV diagnostic category: (d) substance-related disorders; DSM-5 diagnostic category: (p) substance-related and addictive disorders

ii. Schizophrenia and other psychotic disorders: ICD-10-CA: F20, F21, F22, F23, F24, F25, F28, F29; DSM-IV diagnostic category: (e) schizophrenia and other psychotic disorders; DSM-5 diagnostic category: (b) schizophrenia spectrum and other psychotic disorders

iii. Mood disorders: ICD-10-CA: F30, F31, F32, F33, F34, F38, F39, F53.0, F53.1; DSM-IV diagnostic category: (f) mood disorders; DSM-5 diagnostic category: (c) bipolar and related disorders or (d) depressive disorders

iv. Anxiety disorders: ICD-10-CA: F40, F41, F93.0, F93.1, F93.2, F94.0; DSM-IV diagnostic category: (g) anxiety disorders; DSM-5 diagnostic category: (e) anxiety disorders

v. Selected disorders of personality and behaviour: ICD-10-CA: F60, F61, F62, F68 (excluding F68.1), F69; DSM-IV diagnostic category: (p) personality disorders; DSM-5 diagnostic category: (r) personality disorders

vi. Other disorders:

ICD-10-CA

F42, F43, F44, F45, F48.0, F48.1, F48.8, F48.9, F50, F51, F52, F53.8, F53.9, F54, F59, F63 (excluding F63.0), F64, F65, F66, F68.1, F70–F73, F78, F79, F80–F84, F88, F89, F90, F91, F92, F93.3, F93.8, F93.9, F94.1, F94.2, F94.8, F94.9, F95, F98.0, F98.1, F98.2, F98.3, F98.4, F98.5, F98.8, F98.9, F99, O99.3

DSM-IV diagnostic category

(a) Disorders of childhood/adolescence
(c) Mental disorder due to medical conditions
(h) Somatoform disorders
(i) Factitious disorders
(j) Dissociative disorders
(k) Sexual and gender identity disorders
(l) Eating disorder
(m) Sleep disorder
(n) Impulse-control disorders
(o) Adjustment disorders

DSM-5 diagnostic category

(a) Neurodevelopmental disorders
(f) Obsessive-compulsive and related disorders
(g) Trauma- and stressor-related disorders
(h) Dissociative disorders
(i) Somatic symptom and related disorders
(j) Feeding and eating disorders
(k)Elimination disorders
(l) Sleep-wake disorders
(m) Sexual dysfunctions
(n) Gender dysphoria
(o) Disruptive, impulse-control and conduct disorders
(s) Paraphilic disorders
(t) Other mental disorders

3. Sex recorded as male or female

4. Admission to a general or psychiatric hospital (Facility Type Code = 1, 5)

Exclusions:
1. Records with an invalid health card number

2. Records with an invalid code for province issuing health card number

3. Records with an invalid admission date

4. Records with an invalid discharge date

5. Discharges as deaths (Discharge Disposition Code = 07 for DAD/NACRS records; Discharge Reason Code = 2 or 3 for OMHRS)6. Cadaveric donor or stillbirth records (Admission Category Code = R or S)

76. Records that are with a discharge status of dead on arrival (Discharge Disposition = 11, 71* for NACRS)

7. 2018–2019 data onward: Medical assistance in dying (MAID) (Discharge Disposition Code = 73)

Note
*2018–2019 data onward.

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Numerator
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Description:
Total number of individuals in the denominator who had at least three 3 episodes of care for a mental illness in a one1-year period. Each individual has a 12-month look-back period prior to his or her most recent episode of care in a given year. Therefore, data for two 2 fiscal years is necessary to obtain the data for the numerator.

An episode of care for a mental illness is identified using the same inclusion and exclusion criteria as for the denominator.

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Data Sources
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DAD, HMDB, NACRS, OMHRS

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Available Data Years
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Type of Year:
Fiscal
First Available Year:
2014
Last Available Year:
2017 2018

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Geographic Coverage
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All provinces/territories

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Reporting Level/Disaggregation
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National, Province/Territory, Region, Neighbourhood Income Quintile

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