FRAXRechner

FRAXRechner is the German term used for online and digital tools that implement the FRAX fracture risk assessment algorithm. FRAX (Fracture Risk Assessment Tool) estimates the 10-year probability of hip fracture and of major osteoporotic fractures. The FRAXRechner is used by clinicians and patients to gauge fracture risk and to inform decisions about further testing, prevention, and treatment.

FRAX was developed by the World Health Organization Collaborating Centre at the University of Sheffield and collaborators, with country-specific models and data. Calculators are available for many regions, and FRAXRechner typically refers to the German-language or German-context implementations. These tools aim to provide standardized risk estimates that can support clinical guidelines and shared decision-making.

How it works: users enter demographic and clinical risk factors, such as age, sex, height, weight, prior fractures, parental hip fracture, smoking, glucocorticoid use, rheumatoid arthritis, secondary osteoporosis, and alcohol intake. An optional input of femoral neck bone mineral density (BMD) improves precision. The output consists of the 10-year probabilities for hip fracture and for major osteoporotic fracture, usually presented as percentages, often with guidance on interpretation relative to treatment thresholds.

Usage and limitations: FRAXRechner is a decision-support tool, not a substitute for clinical judgment. Risk estimates depend on accurate data entry and population-specific baseline risks. They provide probabilistic risk rather than a diagnosis and should be integrated with clinical evaluation, laboratory tests, and guideline recommendations.

Availability: FRAXRechner tools are widely accessible online, frequently offered in German-language interfaces, and may be integrated into electronic health records or mobile apps where allowed.