Discriminant Functions for Early Recognition of Deterioration in Surgical Patient

 

Patient selection: surgicall patient on the surgical hospital ward

 

Parameters:

(1) heart rate in beats per minute

(2) respiratory rate in breaths per minute

(3) systolic blood pressure in mm Hg

(4) temperature in °C

(5) oxygen saturation in percent

 

f1 =

= (0.03 * (heart rate)) + (0.085 * (respiratory rate)) – (0.003 * (systolic blood pressure)) – (0.43 * (temperature)) – (0.163 * (oxygen saturation)) + 27.583

 

f2 =

= (0.027 * (heart rate)) + (0.091 * (respiratory rate)) – (0.155 * (oxygen saturation)) + 10.613

 

f3 =

= (0.03 * (heart rate)) + (0.121 * (respiratory rate)) – 5.24

Function	Discriminant Score for High Dependency	Discriminant Score for ICU
f1	-0.72	1.07
f2	-0.74	0.95
f3	-0.64	0.91

 

The cutoff for f2 was –0.47 which was 77% sensitive and 88% specific for clinical deterioration.