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Very satisfied and asymptomatic (Grade 0)

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Improved, with minimal symptoms (pain on heavy work) (Grade 1)

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Unchanged, with moderate symptoms (pain on movement) (Grade 2)

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Worse with severe symptoms (pain at rest) (Grade 3)

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Normal function and unlimited use (Grade 0)

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Minimal function loss, unlimited use (loss of flexion or extension 15°) (Grade 1)

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Moderate functional loss, mildly limited use (loss of flexion or extension 15° to 30°)  (Grade 2)

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Severe functional loss, limited use (loss of flexion or extension >30°) (Grade 3)

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Good union and no joint changes (Grade 0)

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Probable union with minimal joint changes (Grade 1)

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Doubtful union, with obvious joint changes (Grade 2)

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No union, severe joint degeneration (Grade 3)