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Number and frequency of fall types among lower limb prosthesis users as categorized by the classification framework. The base-of-support was the most common location of a destabilizing force resulting in a fall (level one). Intrinsic factors were the most common source of a destabilizing force resulting in a fall (level two). Slip, trips, and prosthetic factors accounted for nearly three-quarters of the reported fall patterns (level three).
