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Table 1 Comparison of the original Karnofsky Performance Status Scale (KPS), Thorne-modified Karnofsky Performance Status Scale (TKPS), and the Australia-modified Karnofsky Performance Status Scale (AKPS). Italicised areas reflect the original KPS instrument.

From: The Australia-modified Karnofsky Performance Status (AKPS) scale: a revised scale for contemporary palliative care clinical practice [ISRCTN81117481]

Score (Category) Original Karnofsky (KPS) Thorne-modified Karnofsky (TKPS) Australia-modified Karnofsky (AKPS)
100 (A) Normal; no complaints; no evidence of disease. Normal; no complaints; no evidence of disease. Normal; no complaints; no evidence of disease.
90 (A) Able to carry on normal activity; minor signs or symptoms. Able to carry on normal activity; minor signs or symptoms. Able to carry on normal activity; minor signs or symptoms.
80 (A) Normal activity with effort; some signs or symptoms of disease. Normal activity with effort; some signs or symptoms of disease. Normal activity with effort; some signs or symptoms of disease.
70 (B) Cares for self; unable to carry on normal activity or to do active work. Cares for self; unable to carry on normal activity or to do active work. Cares for self; unable to carry on normal activity or to do active work.
60 (B) Requires occasional assistance but is able to care for most of his needs. Requires professional visits less than once a week. Requires occasional assistance but is able to care for most of his needs.
50 (B) Requires considerable assistance and frequent medical care Requires professional visits more than once a week. Requires considerable assistance and frequent medical care
40 (C) Disabled; requires special care and assistance. In bed more than 50% of the time. In bed more than 50% of the time.
30 (C) Severely disabled; hospitalisation necessary; active supportive treatment is necessary. Almost completely bedfast. Almost completely bedfast.
20 (C) Very sick; hospitalisation necessary; active supportive treatment is necessary. Totally bedfast and requiring extensive nursing care by professionals and/or family. Totally bedfast and requiring extensive nursing care by professionals and/or family.
10 (C) Moribund; fatal processes progressing rapidly. Comatose or barely arousable. Comatose or barely arousable.
0 Dead. Dead. Dead.