Discriminative Function of Garrison et al for Predicting Survival of a Cirrhotic Patient After Celiotomy Using Preoperative Factors

 

Parameters:

(1) serum albumin in g/dL

(2) concomitant infection or peritoneal contamination

(3) preoperative aPTT and upper limit of reference range (control)

 

Infection or Contamination	Points
absent	2
present	1

 

discriminative value =

= (0.86204 * (preoperative albumin)) + (1.23263 * (points for concomitant infection or contamination)) - (0.05189 * ((preoperative aPTT in seconds) - (upper limit of aPTT reference range in seconds))) - 4.90019

 

Interpretation:

• minimum value: around -4.0

• maximum value: around 2.0

• The lower the value the worse the survival.

Discriminative Value	Outcome
>= 0.625	survival
-1.33985 to 0.624	indeterminate
<= -1.33986	nonsurvival

 

Performance:

• The discriminative value was able to predict outcome with 83% accuracy (71% nonsurvival and 89% survival).