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

 

about institute for clinical evaluative sciences (ICES) ischemic heart disease 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.

The Institute for Clinical Evaluative Sciences (ICES) is an independent not-for-profit corporation that receives core funding from the Ontario Ministry of Health and Long-Term Care.

DATA SOURCE

Original source: Ontario Health Insurance Plan (OHIP) Claims Database, Discharge Abstract Database (DAD)
Distributed by: Institute for Clinical Evaluative Sciences (ICES)
Cite as: OHIP Claims Database (OHIP) and Discharge Abstract Database (DAD), 1996-2015, Institute for Clinical Evaluative Sciences (ICES) [Data provided by special request, May, 2017].

METHODS

Data Collection Methods

ICES use data from the following databases to make a determination of ischemic heart disease prevalence and incidence:

  • Ontario Health Insurance Plan (OHIP) Claims Database – 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 of service.
  • Discharge Abstract Database (DAD) – The DAD summarizes the hospital discharge information of individuals receiving inpatient care in a non-mental health designated bed. Each record contains demographic, clinical and administrative data regarding the hospitalized individual, including 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.
  • Registered Persons Database (RPDB) – 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.
  • Canadian Census 2011 – This database contains information from the 2011 Canadian Census including population counts.
  • Yearly Ontario intercensal and postcensal population estimates and projections – This database contains yearly estimates of the Ontario population, overall and by smaller geographical units such as public health units, as measured on July 1 of each year.

Cases of ischemic heart disease (IHD) were defined as at least one record in the DAD (either diagnostic or procedure code), or 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 (either diagnostic or fee code) for the following codes:

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) CCP Code name
1IJ50 Dilation, coronary arteries
1IJ57GQ Extraction, coronary arteries
1IJ76 Bypass, coronary arteries

CCP - Canadian Classification of Diagnostic, Therapeutic and Surgical interventions (2002+) CCP 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

Data Analysis methods

  • Inclusion criteria: All individuals living in Ontario with ischemic heart disease (IHD). Individuals were identified with the disease according to an IHD algorithm1 using diagnostic code information from OHIP and DAD. Individuals had to be 20 years and older but less than 106 years.
  • 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.
  • Prevalence: The numerator was all individuals residing in the Region of Peel or Ontario, diagnosed with IHD since 1991. The denominator was all individuals living in the Region of Peel or Ontario (according to Ontario population estimates and projections). Total rates were age-sex-standardized and rates by sex were age-standardized to the 2011 Canadian Census population. Age-specific crude rates were also provided.
  • Incidence: For each year (January 1 to December 31) from 1996 to 2014, the numerator was all individuals residing in the Region of Peel or Ontario who were newly identified in that year with IHD. The denominator was all individuals living in the Region of Peel or Ontario (according to Ontario population estimates and projections) that did not have IHD (i.e., the susceptible population). Total rates were age-sex-standardized and rates by sex were age-standardized to the 2011 Canadian Census population. Age-specific crude rates were also provided.
  • Cells of less than or equal to 5 individuals are not reportable for privacy reasons, and appear in the tables as "NR" for "Not releasable due to small numbers".

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: e225–8.

Last updated: February 12, 2019



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

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

Smaller Text Larger Text