Atypical Fracture Cohort Study

University Health Network, Toronto

Status: Enrolling

Conditions: Atypical Subtrochanteric Fracture; Osteoporosis With AFf; Atypical Femur Fracture

Study type: Observational

Funder types: Other

Identifiers

NCT01747291

09-0532

Details and patient eligibility

About

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.

Enrollment: 300 estimated patients

Sex: All

Ages: 20 to 100 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 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.

Exclusion criteria

• Peri-prosthetic fractures;
• High trauma fractures;
• Pathological fractures secondary to metastases or metabolic bone diseases other than osteoporosis.

Trial design

300 participants in 1 patient group

Atypical femur fracture cohort