| Screening test | Screening eligibility by age and sex (denominator)* | Exclusion criteria | Uptake of screening test (numerator) | |
|---|---|---|---|---|
| Data source | Look-back window† | |||
| Colorectal26 | 50-74 yr, men and women | History of colorectal cancer (OCR) or surgical removal of colon (CIHI) | Fecal occult blood test, flexible sigmoidoscopy or colonoscopy (OHIP) | Fecal occult blood test: 2 yr; flexible sigmoidoscopy: 5 yr; colonoscopy: 10 yr |
| Breast27 | 50-74 yr, women | History of breast cancer (OCR) or bilateral mastectomy (CIHI/OHIP) | Mammography (OBSP or OHIP) | 2 yr |
| Cervical28 | 30-69 yr, women | History of cervical cancer (OCR) or hysterectomy (CIHI/OHIP) | Pap test (CytoBase or OHIP) | 3 yr |
| Glucose29 | 40-74 yr, men and women | Diagnosis of diabetes (ODD) | Blood glucose test (OHIP) | 3 yr |
| Cholesterol30 | 50-74 yr, women; and 40-74 yr, men | Diagnosis of myocardial infarction (OMID) | Serum blood cholesterol test (OHIP) | 5 yr |
Note: CIHI = Canadian Institute for Health Information, OBSP = Ontario Breast Screening Program, OCR = Ontario Cancer Registry, ODD = Ontario Diabetes Database, OHIP = Ontario Health Insurance Plan, OMID = Ontario Myocardial Infarction Database.*To be eligible, a person was required to be alive in an eligible age range at any time during 2011 with a valid OHIP number throughout 2010 and 2011, and at least 1 record of service delivery between 2006 and 2011.†The look-back window reflects the recommended screening interval for each test. There are different look-back windows because each test has a different recommended screening interval according to each specific screening guideline. For example, a woman who is screen-eligible for a Pap test in 2011 is recommended to have a Pap test every 3 years. To identify whether she had one, we used the OHIP and CytoBase databases to find any record of her having a Pap test during the 3-year period (or look-back window) from 2008 to 2011 inclusive.