A performance scale (Animal Medical Center Performance Scale) for use in dogs and cats was developed by modifying the Karnofsky Performance Status that is used in people. It was then applied to 209 animals that received definitive radiotherapy. The results after a minimum of 1 year of observation after therapy indicated that survival times were significantly longer for those animals that scored 80 or higher on the scale. Further studies will be needed to determine its usefulness with specific tumor types.
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