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Table 3 Prediction functions for treatment intensity and treatment length

From: Toward cost-effective staffing mixes for Veterans Affairs substance use disorder treatment programs

   Cost factor Prediction function Adj. R2
24 h care Inpatient Treatment intensity (hours/day) 12.146–452.776*RESMD-8.568*RN + 124.438*CLERC + 187.722*PDTR-69.657*SOCWK-22.342*PRACT + 4.941*ADTHR-15.617*PSYCH + 268.324*OCTHR-95.138*MD-31.492*AIDES 1.000
Treatment length (days) −28.168 + 118.794*PSYCH + 210.522*SOCWK + 86.483*RN-632.262*PDTR + 176.915*PRACT + 0.281*(BASELINE CONTROLLED ENVIRONMENT) 0.469
Residential Treatment intensity (hours/day) 0.594 + 161.368*RESMD + 7.160*AIDES + 7.131*RN + 10.740*PRACT + 11.241*MD-4.762*SOCWK + 8.193*OCTHR + 4.170*PSYCH −0.014*(BASELINE DRUG PROBLEM)-0.012*(BASELINE CONTROLLED ENVIRONMENT) 0.517
Treatment length (days) 65.688–208.151*PRACT + 392.280*OCTHR + 257.058*MD-892.674*RESMD-191.554*PDTR-72.917*CLERC-57.393*RN −57.240*SOCWK + 0.582*(BASELINE CONTROLLED ENVIRONMENT)-0.008*(BASELINE EMPLOYMENT EARNING) −0.248*(BASELINE MEDICAL PROBLEM) 0.195
Outpatient Intensive Treatment intensity (hours/day) 5.002 + 23.378*PRACT-10.074*LVN-20.253*PSYCH + 7.961*PDTR-7.992*SOCWK + 7.700*OCTHR + 3.800*MD-6.926*RESMD −5.657*AIDES-3.417*ADTHR + 0.008*(BASELINE PSYCH PROBLEM) 0.957
Treatment length (days) 97.435–0.797*(BASELINE DRUG PROBLEM)-103.899*RN-110.129*RESMD 0.026
Standard Treatment intensity (hours/day) 3.604 + 8.185*PRACT-3.924*ADTHR-4.250*AIDES-4.325*CLERC + 6.289*RESMD + 4.266*PSYCH + 4.276*OCTHR +0.209*(10^-3)*(BASELINE EMPLOYMENT EARNING) 0.372
Treatment length (days) 59.413 + 0.819*(BASELINE CONTROLLED ENVIRONMENT) + 333.825*PDTR + 45.783*PRACT + 310.603*LVN 0.022
  1. MD: % psychiatrists or mds; RESMD: % resident physicians or fellows; PRACT: % nurse practitioners or physicians assistants; PSYCH: % psychologists; SOCWK: % social workers; ADTHR: % addiction therapists; OCTHR: % recreational/occupational therapists; RN: % registered nurses; LVN: % licensed vocational/practical nurses; CLERC: % clerical staff; AIDES: % aides/technicians; PDTR: % paid trainees