analysisofvariance cancer classification control costcontrol costs costsandcostanalysis diagnosis-relatedgroups diagnosticrelatedgroups economicaspects economics forecasting healthinsurance hospital hospitaladministration hospitalizationinsurance hospitalpatients hospitals hospitalutilization lengthofstay medicalcare medicaloncology methods negotiating neoplasms newjersey newyork newyork(state) olderpeople patients prevention prospectivepayment statisticalmethods treatment trends unitedstates wx157a769n1984