TABLE 5.

Multiple linear regression analysis of independent predictors of total hospital chargesa

FactorF valueP valueCost ratioLeast squares mean of charges (dollars)b
Length of stay491.17<0.00011.03
Total no. of blood cultures drawn1.21
    Linear term222.30<0.0001
    Quadratic term141.33<0.00010.99
Acquisition90.64<0.0001
    Community acquired46,879
    Hospital acquired71,385
Presence of endotracheal tube at T041.49<0.0001
    No47,666
    Yes70,206
Polymicrobial6.410.0115
    No53,520
    Yes62,528
Admitting service4.79<0.0001
    Obstetrics and gynecology35,198
    General medicine46,167
    Urology48,154
    General Hematology/Oncology50,232
    Cardiology51,045
    Neurology53,508
    Other (including psychiatry)55,231
    Vascular surgery59,621
    Solid organ transplant61,557
    Burn unit62,016
    General surgery63,494
    Bone marrow transplant66,299
    Cardiovascular surgery69,563
    Orthopedic surgery78,356
    Neurosurgery78,795
Gender4.490.0343
    Female55,487
    Male60,311
Charlson index score2.710.0290
    052,376
    158,703
    254,967
    3, 4, 559,077
    ≥664,887
  • a R = 0.79.

  • b Adjusted for mean values of covariables, i.e., length of stay = 19.7 days and no. of blood cultures drawn = 5.3.