Definition: Percentage of breast cancer mastectomies that were performed as day surgery.
Rationale for measurement: Reporting on mastectomies performed as day surgery allows detection of variations in practice across provinces, and helps to identify opportunities to improve patients’ experiences and reduce system costs by avoiding in-patient stays for patients who could safely recover at home.
Data were aggregated at national level: fiscal years 2008/09 to 2015/16
Data were aggregated at provincial level: fiscal years 2014/15-2015/16 combined
Denominator: Total number of mastectomies for women aged 18+ diagnosed with breast cancer
Numerator: The number of mastectomies performed as day surgery for women aged 18+ diagnosed with breast cancer
Women younger than 18 years of age
Potential duplicate records are identified as discharges with identical values in some of the data elements. In the event that duplicate records are found, the most recent record is retained, the remaining duplicate records are removed
Invalid Health Card Number
Procedures coded as abandoned
Newborns, stillbirths and cadaveric donors
Invalid procedure date
No discharge procedure laterality assigned
Invalid postal codes
Data were aggregated at national level: BC, AB, MB, ON, NB, NS and NL
Data were aggregated at provincial level: all provinces and territories, except QC
Data were aggregated at national level: by fiscal year
Data were aggregated at provincial level: by province
Data source: Canadian Institute for Health Information; Hospital Morbidity Database (HMDB); National Ambulatory Care Reporting System; Alberta Ambulatory Care Reporting System.
Data retrieval date: November 2017
Variables details: Not applicable
Notes from jurisdictions: Not applicable
Analysis was conducted and provided by Canadian Institute for Health Information.
Patients receiving a mastectomy anywhere within the discharge record containing the surgical episode associated with the patient’s first breast resection are considered mastectomy cases.
Based on patient's place of residence.
Changes to definition compared to previous years: Not applicable