Health administrative data sets from the Manitoba Centre for Health Policy repository
| Data set | Description of study relevant data |
|---|---|
| Manitoba Health Insurance Registry | The registry contains demographic information for most residents of Manitoba, including data for all-cause mortality. |
| Hospital abstracts | These abstracts contain data on all hospital admissions in Manitoba, which were used to identify patients who had received angiography, PCI and CABG, and hospital readmissions after angiography. Appendix 1 (available at www.cmajopen.ca/content/8/4/E685/suppl/DC1) includes a complete list of ICD and Canadian Classification of Health Interventions codes used in this study. |
| Medical claims and medical services | Claims for physician visits in offices, hospitals and outpatient departments were used to identify baseline comorbidities. Twenty-five codes were taken from hospital abstracts and medical claims data over a 1-year period immediately before the index angiography date. These data were used to calculate the Charlson Comorbidity Index score, which reflects the level of comorbidity based on 17 comorbidity categories, each consisting of specific ICD-9 and ICD-10 diagnostic codes. |
| 2006 and 2011 Canadian Census | Estimation of income quintile scores were calculated using patient postal codes and their associated Census dissemination area-level average household income. Separate income quintiles were used for urban (Winnipeg and Brandon) and rural (all other areas) residents. |
| Vital Statistics Mortality Registry | This registry was used to identify mortality, specifically related to cardiovascular causes. |
| The Indian Registry System | This system is maintained by the Department of Indigenous Services Canada and, with permission, was linked to the Manitoba Health Insurance Registry to identify status First Nations people. |
Note: CABG = coronary artery bypass graft, ICD = International Classification of Diseases, PCI = percutaneous coronary intervention.