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Table 3 Result of logistic regression analysis in the derivation cohort and points assigned to each procedure

From: Procedure-based severity index for inpatients: development and validation using administrative database

Variable β exp(β) 95 % CI P value Points for procedure
Admission-precipitating diagnosis
  Acute myocardial infarction Ref     
  Congestive heart failure −0.10 0.90 0.83 – 0.98 0.012  
  Acute cerebrovascular disease −0.11 0.90 0.82 – 0.97 0.010  
  Gastrointestinal hemorrhage −0.51 0.60 0.55 – 0.66 <0.001  
  Pneumonia 0.04 1.04 0.95 – 1.13 0.405  
  Septicemia 0.73 2.07 1.87 – 2.28 <0.001  
Sex (female) −0.12 0.89 0.86 – 0.91 <0.001  
Age
  <60 Ref     
  60–69 0.35 1.43 1.33 – 1.53 <0.001  
  70–79 0.68 1.98 1.86 – 2.11 <0.001  
  80–89 1.14 3.12 2.94 – 3.31 <0.001  
  ≥90 1.60 4.96 4.65 – 5.30 <0.001  
Charlson comorbidity index
  0 Ref     
  1 0.03 1.03 0.98 – 1.07 0.233  
  2 0.18 1.20 1.16 – 1.24 <0.001  
  ≥3 0.72 2.05 1.96 – 2.14 <0.001  
Procedure
  Invasive arterial pressure measurement −0.30 0.74 0.68 – 0.81 <0.001 −3
  Blood tests (excluding coagulation) −0.26 0.77 0.73 – 0.81 <0.001 −3
  Radiography −0.20 0.82 0.79 – 0.86 <0.001 −2
  Urinalyses (excluding chemistry) −0.18 0.84 0.81 – 0.87 <0.001 −2
  Temporary urinary catheterization −0.18 0.84 0.74 – 0.94 0.004 −1
  Endocrinology tests −0.06 0.94 0.91 – 0.97 <0.001 −1
  Bacterial microscopy or culture −0.05 0.95 0.91 – 0.99 0.019 −1
  Acid-fast bacilli culture −0.04 0.96 0.91 – 1.02 0.206 #
  Coagulation tests −0.03 0.97 0.94 – 1.01 0.117 #
  Nucleic acid amplification tests 0.01 1.01 0.93 – 1.09 0.842 #
  Bacterial drug susceptibility tests 0.06 1.06 1.01 – 1.12 0.022 1
  Urine chemistry tests 0.10 1.10 1.00 – 1.21 0.041 1
  Heart rate/respiration monitoring 0.18 1.20 1.16 – 1.24 <0.001 2
  Peripheral intravenous infusion 0.18 1.20 1.16 – 1.24 <0.001 2
  Computed tomography scan 0.25 1.28 1.24 – 1.32 <0.001 3
  Pulse oximetry 0.29 1.33 1.29 – 1.37 <0.001 3
  Gastric drainage tube insertion 0.32 1.38 1.27 – 1.50 <0.001 4
  Urinary catheter insertion 0.47 1.60 1.55 – 1.66 <0.001 5
  Central venous catheter insertion 0.49 1.63 1.49 – 1.77 <0.001 5
  Use of catecholamines or vasopressin 0.70 2.02 1.92 – 2.13 <0.001 8
  Sputum suction 1.11 3.04 2.92 – 3.16 <0.001 12
  Intratracheal intubation 2.05 7.77 7.14 – 8.45 <0.001 23
  1. # No points assigned because of non-significance of the coefficient
  2. CI – confidence interval