Grade 0 | Grade 1 | Grade 2 | Grade 3 | |
---|---|---|---|---|
Swelling and pain | no swelling or pain | slight swelling and discomfort after strenuous exercise | moderate swelling and pain following moderate exertion | considerable and tense swelling, severe pain interfering with activities of daily living, pain at rest |
Range of motion | no limitation of range of motion | some giving-way or weakness, muscular atrophy < 1 cm | limitation of range of motion between 10 and 20 degrees | limitation of range of motion > 20 degrees |
Instability and weakness | no instability or weakness | negligible limitation of range of motion (< 10 degrees) | slight or moderate instability, locking, and muscular atrophy 1-2 cm | disabling instability, contractures, and muscular atrophy > 2 cm |
The situation at work or sports participation | no limitation in work or sports participation | no hard labor, no elite sports participation | no physical work, limited participation in sports | stopped working due to knee derangement, no participation in sports |