karnofsky performance status patients ecog higher days greater registration prior 
kps karnofsky performance status score greater patients equal patient ecog 
age years lansky karnofsky performance status patients scale children ecog 
status performance ecog karnofsky appendix occasional help care patients able 
old lansky years karnofsky performance score patients status younger individuals 
equal greater age years karnofsky performance status lansky ecog participants 
lansky score karnofsky performance years patients inclusion scores greater adults 
karnofsky ecog poor health rating index screening time false fancc