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Table 1 Alternative Choices for Numeric Thresholds (used with permission)

From: Patterns of unexpected in-hospital deaths: a root cause analysis

VITAL SIGN NUMERIC THRESHOLDS
  Bradycardia Tachycardia Hypotension Hypertension Bradypnea Tachypnea SPO2
Calzavacca (2008) <40 >120 <90   <8 >25 <90
Genardi (2008) <40 >130 <90   <8 >24  
Hravnak (2008) <40 >140 <80 >200 <8 >36 <85*5 min
Brilli (2007)      <8   <90 (Suppl. O2)
Dacey (2007) <50*15 min. >130*15 min    <8 >30  
Halvorsen (2007) <40 >120 <90   <8 >30 <88 (Suppl. O2)
McFarlan (2007) <51 >120 <91   <8 >24 <90 (RA) or
        <92 (Suppl. O2)
Offner (2007) <40 >120 <90   <8 >24  
Sebat (2007)    <90    >19  
Garretson (2006) <40 >130 <90   <8 >30 <90 (Suppl. O2)
Jones (2005) <40 >130 <90   <8 >30 <90 (Suppl. O2)
Hillman (2005) <40 >140 <90   <5 >36  
Tibballs (2005)    Age Index     <90 (Suppl. O2) or
        <60 (Cyanotic HD)
Bellomo (2004) <40 >130 <90   <8 >30 <90 (Suppl. O2)
DeVita (2004) <40 >140 <80 >200 <8 >36 <85*5 min
Bellomo (2003) <40 >130 <90   <8 >30 <90 (Suppl. O2)
Buist (2002)   >130 <90   <6 >30 <90 (Suppl. O2)
Hodgetts (2002)    Weighted