Data Impact Challenge Question 6b

Question 6b: For what portion of adults is a dual energy X-ray absorptiometry (DEXA) scan repeated more often than every 2 years? (Relates to Choosing Wisely Canada Rheumatology recommendation #3)

Choosing Wisely Canada is a campaign to help physicians and patients engage in conversations about unnecessary tests, treatments and procedures. Canadian national specialty societies participating in the campaign, representing a broad spectrum of physicians, were asked to develop lists of “Five Things Physicians and Patients Should Question.” These lists identify tests, treatments or procedures commonly used in each specialty, which are not supported by evidence, and/or could expose patients to unnecessary harm. Increasing understanding of the frequency with which care does or does not follow these recommendations could support targeted improvement and potentially could impact policy interventions.


Through the Data Impact Challenge, two submissions were received in response to this question. The first submission was received within the first week following the Challenge launch date. Submissions came from Alberta and an Ontario hospital. In both submissions, the scope included inpatient and outpatient scans. The aggregate sample size for all submissions was approximately 58,000 scans.

Guiding Specifications

Sample: Minimum of 10,000 records
Timeframe: Analysis should include at least six months of data

Participating Teams

Alberta Health Data Geeks

Team bio: Team Treat Cancer WISely: Clinical and methodological researchers from WCRI, ICES and Sunnybrook Health Sciences Centre with interest in screening practices.
Entry: PDF


St. Michael’s Hospital Medical Imaging

Team bio: The St. Michael’s Hospital Medical Imaging team is comprised of radiologists and data scientists with strong technical backgrounds and a passion for innovating in healthcare.
Entry: PDF