A-Z List | Accessible Info | Careers | Contact Us

 

about ischemic heart disease prevalence and incidence data

Contact Peel Public Health to submit:

Need help understanding the data contained on this site?

  • For each data source, information about data collection and analytical methods, limitations, the citation and additional resources can be found on the Data Sources and Methods page.

SOURCE

Original source: Institute of Clinical Evaluative Sciences (ICES)
Distributed by: Institute of Clinical Evaluative Sciences (ICES)
Cite as: Sources: Ischemic Heart Disease Database, , 1996-2013. Institute for Clinical Evaluative Sciences.

METHODS

Data Collection Methods

  • ICES uses data from the following databases to make a determination of ischemic heart disease prevalence and incidence:
    • Ontario Health Insurance Plan Claims Database (OHIP)
    • Discharge Abstract Database (DAD)
    • Registered Persons Database (RPDB)
  • The OHIP database contains approved physician claims data from inpatient, outpatient and long-term care settings for physicians in Ontario. Among other information, each record identifies the physician, the patient, the diagnosis responsible for the claim (which follows the ICD-9 coding scheme), the service provided and the date at which the service was provided.
  • The DAD summarizes the hospital discharge information of individuals receiving inpatient care (excluding hospitalizations in an adultmental health-designated bed). Each record contains demographic, clinical and administrative data regarding the hospitalized individual. The clinical information includes the diagnosis most responsible for the hospitalization (which follows the ICD-9 coding scheme before 2002 and the ICD-10 scheme from 2002 onwards), as well as comorbidities and procedures received.
  • The RPDB contains demographic information such as age, sex, health insurance eligibility and death information for anyone who has received Ontario health care coverage. It contains postal code information that is linkable to other geographic information such as public health unit.
  • The IHD database identifies persons aged 20 years and older in Ontario with IHD since 1991. It uses a previously-validated algorithm1 to identify persons with IHD.

Analysis Methods

  • Ischemic heart disease (IHD) cases were defined as at least one record in the DAD (diagnostic or procedure code) or IHD records within a one-year period in OHIP with at least one record by a specialist or a family physician in a hospital/emergency room setting (diagnostic or fee code).
  • The following codes were used to define IHD:

    OHIP CODES

    ICD-9 (diagnostic code) ICD Code name
    410 Acute myocardial infarction
    412 Old myocardial infarction
    413 Angina pectoris
    ICD-9 (fee code)  
    R742 Heart peri-coronary artery repair-single
    R743 Heart peri-coronary artery repair-double
    Z434 Angiography-transluminal coronary angioplasty
    G298 Coronary angioplast stent

    DAD

    ICD-9 (diagnostic code) ICD Code name
    410 Acute myocardial infarction
    411 Other acute and subacute forms of ischemic heart disease
    412 Old myocardial infarction
    413 Angina pectoris
    414 Other forms of chronic ischemic heart disease

     

    ICD-10 (diagnostic code) ICD Code name
    I20 Angina pectoris
    I21 Acute myocardial infarction
    I22 Subsequent myocardial infarction
    I23 Certain current complications following acute myocardial infarction
    I24 Other acute ischaemic heart diseases
    I25 Chronic ischaemic heart disease

     

    CCP - Canadian Classification of Diagnostic, Therapeutic and Surgical Procedures (pre2002) CPP Code name
    1IJ50 Dilation, coronary arteries
    1IJ57GQ Extraction, coronary arteries
    1IJ76 Bypass, coronary arteries

     

    CCP - Canadian Classification of Diagnostic, Therapeutic and Surgical interventions (2002+) CPP Code name
    48.02 Percutaneous transluminal coronary angioplasty (ptca) without mention of thrombolytic agent
    48.03 Percutaneous transluminal coronary angioplasty (ptca) with thrombolytic agent
    48.09 Other removal of coronary artery obstruction
    48.1 Bypass anastomosis for heart revascularization

  • Inclusion criteria: All individuals living in the Peel public health region with ischemic heart disease (IHD). Individuals were identified with the disease according to IHD algorithm1 using diagnostic code information from OHIP and DAD.
  • Exclusion criteria: Individuals were excluded if they did not have an Ontario postal code or did not have contact with the Ontario health care system within the past seven years. Individuals had to be 20 years and older but less than 106 years.
  • Calculation of Prevalence: For each year, the numerator was all individuals residing in Peel region with IHD. The denominator was all individuals living in Peel according to the Ontario population estimate table. For each year (January 1 to December 31) from 1996 to 2013, the overall crude and age-sex adjusted prevalence estimates (per 1,000) were estimated. The standard population used for this calculation was the 1991 Canadian Census population.
  • Calculation of Incidence: For each year, the numerator was all individuals residing in Peel region who were newly identified in that year with IHD. The denominator was all individuals living in Peel according to the Ontario population estimate table that did not have the disease of interest (i.e. the susceptible population). For each year (January 1 to December 31) from 1996 to 2013, the overall crude and age-sex adjusted incidence estimates (per 1,000) were calculated. The standard population used for this calculation was the 1991 Canadian Census population.
  • Ontario intercensal and postcensal population estimates and projections were used to calculate prevalence and incidence rates.

LIMITATIONS

  • Currently, this data source only provides information at the Census Division (CD) or Public Health Unit (PHU) level of geography.

REFERENCES AND RESOURCES

  1. Tu K, Mitiku T, Lee DS, Guo H, Tu J V. Validation of physician billing and hospitalization data to identify patients with ischemic heart disease using data from the Electronic Medical Record Administrative data Linked Database (EMRALD). Can J Cardiol; 26: e2258.


Health Topics A-Z | Information for Professionals | Information for Workplaces
| School Corner | Employment/Volunteer Opportunities | Clinics, Classes and Events | Resources & Factsheets | Translated Information | About Public Health | Contact Us | Public Health Home Page

www.peelregion.ca

Home | Contact Us | Search
A-Z Topic List | Privacy & Terms of Use

Smaller Text Larger Text