Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Orthopedics
Estimate 10-year risk of major osteoporotic and hip fracture using the WHO FRAX tool. Treatment threshold: major fracture risk ≥20% or hip fracture risk ≥3% in patients without BMD testing.
Formula
Simplified FRAX-inspired model. For official results use WHO FRAX (sheffield.ac.uk/FRAX).
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Orthopedics
Use the Ottawa Ankle Rules to determine if an ankle X-ray is needed after injury. A validated clinical decision rule with ~98% sensitivity for fractures.
Formula
X-ray indicated if: bone tenderness along distal 6 cm of malleolus OR inability to bear weight 4 steps OR tenderness at navicular OR tenderness at base of 5th metatarsal.
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