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Table 4 Logarithmic and Constant Models for Ln PD Cost (MA Database)

From: Accounting for the relationship between per diem cost and LOS when estimating hospitalization costs

  Logarithmic Model (F) Constant Model (G)
   Estimate (SE) P-Value Estimate (SE) P-Value
Intercept 9.281 (0.271) <.0001 8.445 (0.037) <.0001
Ln(LOS) −0.315 (0.101) 0.002 NA NA
Complication Group Death 1.365 (0.281) <.0001 0.903 (0.049) <.0001
  Bleed 0.25 (0.281) 0.375 0.258 (0.04) <.0001
  MI 0.107 (0.362) 0.769 0.219 (0.051) <.0001
  None/Other 0.110 (0.271) 0.685 0.218 (0.037) <.0001
  Infection 0.384 (0.315) 0.224 0.179 (0.045) <.0001
  >2 Compls −0.17 (0.699) 0.808 0.173 (0.083) 0.038
  2 Compls −0.053 (0.307) 0.864 0.034 (0.045) 0.444
  Renal −0.086 (0.288) 0.765 0.013 (0.041) 0.759
  Stroke Reference* Reference*
Ln(LOS) x Compl. Group Death −0.313 (0.106) 0.003   
  Bleed −0.054 (0.107) 0.611   
  MI −0.005 (0.146) 0.973   
  None/Other −0.042 (0.102) 0.677   
  Infection −0.113 (0.121) 0.35   
  >2 Compls 0.16 (0.225) 0.477   
  2 Compls 0.049 (0.113) 0.662   
  Renal 0.032 (0.108) 0.765   
  Stroke Reference*   
  1. * Patients with stroke are used as the reference category for indicators of complication: coefficients represent difference in log PD costs for each type of complication relative to stroke.