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Table 3 Characteristics of patients with an intensive care unit (ICU) length of stay below (<5days) vs. above (> 5 days) a clinical threshold for concern about a prolonged ICU stay.

From: A predictive model for the early identification of patients at risk for a prolonged intensive care unit length of stay

  Regular ICU Stays Prolonged ICU Stays P-value
# Admissions 270,487 73,068  
Age (years) 61.6 ± 17.7 61.9 ± 17.4 0.002
Acute Physiology Score - Day 1 36.2 ± 23.7 53.5 ± 25.7 <0.001
Day 1 ICU LOS Prediction 3.26 ± 2.04 5.80 ± 2.29 <0.001
Prior LOS (square root of days) 0.89 ± 1.27 1.26 ± 1.64 <0.001
Gender = Male 54.1% 55.1% <0.001
Operative 31.7% 23.1% <0.001
Emergency Surgery 5.2% 9.2% <0.001
ICU Readmission 5.0% 10.6% <0.001
Mechanical Ventilation on Day 1 27.9% 66.2% <0.001
Received active treatment on Day 1 53.5% 82.5% <0.001
≥ 1 Chronic health item 12.4% 16.4% <0.001
Race    <0.001
   White 65.9% 65.5%  
   Black 13.1% 15.2%  
   Latino 3.8% 3.8%  
   Other 17.3% 15.5%  
Location Prior to ICU Admission    <0.001
   Operating Room 9.9% 10.9%  
   Recovery Room 21.8% 12.3%  
   Emergency Room 38.0% 33.2%  
   Floor 15.0% 22.9%  
   Other Hospital 5.2% 8.3%  
   Direct Admission 5.7% 4.2%  
SDU 4.4% 8.4%  
Visit    <0.001
   1 95.1% 89.5%  
   2 4.4% 8.8%  
   ≥ 3 0.6% 1.7%  
Top Five Diagnostic Groups*    
Congestive heart failure 3.7% Bacterial pneumonia 5.2%
Gastrointestinal bleeding, Upper 3.1% Congestive Heart Failure 3.6%
Rhythm disturbance 3.1% Sepsis, pulmonary 3.1%
Drug Overdose 2.6% Intracerebral hemorrhage 3.0%
Carotid endarterectomy 2.6% Cardiac Arrest 2.9%
  1. * Does not include 'miscellaneous" categories within a body system.