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Table 3 Classification criteria for the intensity of the adverse event

From: Robotic- and orthosensor-assisted versus manual (ROAM) total knee replacement: a study protocol for a randomised controlled trial

Intensity Description
Mild An event easily tolerated by the patient, causing minimal discomfort and not interfering with everyday activities
Moderate An event sufficiently discomforting to interfere with normal everyday activities
Severe An event that prevents normal everyday activities