NCT01747291Recruiting
Atypical Fracture Cohort Study
Atypical Femur Fracture Ontario Cohort Registry
Source: ClinicalTrials.gov · Last updated 11 May 2026
Brief summary (registry, in English)
Osteoporosis is a disease characterized by increased bone fragility and deteriorating bone micro-architecture. The main consequence of osteoporosis is low-trauma fractures, most often of the hip, spine and wrist. Recently, another type of low-trauma fracture, atypical femur fractures (AFFs), have received much attention. Little is known of the cause of these debilitating fractures; however, they have been associated with long term bisphosphonate use. What we currently know about AFFs is based on case reports or small case series, or studies using administrative databases or secondary analyses of bisphosphonate trials. While these reports provide some preliminary information on the relationship between long term bisphosphonate exposure and AFFs, detailed clinical data are absent. As we have established a network of specialists across southern Ontario our group is in a position to collect meaningful information on a larger group of patients who have experienced these debilitating fractures into a centralized AFF registry.
- Status (registry)
- Recruiting
- Study type
- Observational
- Enrollment
- 300 (estimated)
- First submitted
- 7 Dec 2012
- Start date
- 1 Jun 2009
- Primary completion date
- 31 Dec 2027
- Lead sponsor
- University Health Network, Toronto
- Diseases
- Osteoporosis
- NCT number
- NCT01747291
What you commit to
- Study type: Observational
- Planned participants: 300
- From 1 Jun 2009 to the primary completion date, 31 Dec 2027
- 3 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Pathological fractures secondary to metastases or metabolic bone diseases other than osteoporosis.
Other
- Peri-prosthetic fractures;
- High trauma fractures;
Who the study is looking for
- Patients over the age of 20;
- Patients who have experienced an incomplete AFF that satisfies the diagnostic criteria as set forth by the American Society of Bone and mineral Research (ASBMR) International Task Force on AFFs or a low (or no) trauma fracture that mimics the features described above at other sites.
Age in the registry: 20 years to 100 years · Sex: All · Does not accept healthy volunteers
Sites (3)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| McMaster University Coordinator of this site? Confirm its status | Hamilton | Canada | Enrolling by invitation |
| University Health Network Coordinator of this site? Confirm its status | Toronto | Canada | Recruiting |
| St. Michael's Hospital Coordinator of this site? Confirm its status | Toronto | Canada | Enrolling by invitation |
This page is information, not medical advice. Discuss any trial with your doctor.