Patient selection: adult with acute cholangitis
Parameters:
(1) age in years, from 20 to 100
(2) ventilator support time, units not given, presumed hours, from 0 to 240
(3) diabetes
(4) coagulopathy
(5) systolic blood pressure
points for age =
= (1.1325 * (age)) - 22.65
points for ventilator support time =
= (0.19958 * (hours))
|
Parameter
|
Finding
|
Points
|
|
diabetes
|
no
|
0
|
|
|
yes
|
100
|
|
coagulopathy
|
no
|
0
|
|
|
yes
|
44.8
|
|
systolic blood pressure
|
normal (90-140 mm Hg)
|
0
|
|
|
abnormal (< 90 or > 140)
|
20.1
|
total score =
= SUM(points for all 5 parameters)
Interpretation:
• minimum score: 0
• maximum score: 303.4
value of X =
= (0.02197 * (score)) - 2.321
probability of sepsis =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC is 0.70 for the training and 0.65 for the validation sets.
