Patient selection: GI surgery (hepatobiliary, pancreatic, colorectal)
Outcome: 1-year mortality
Parameters:
(1) age in years
(2) preoperative hemoglobin in g/dL
(3) ECOG performance status
(4) sarcopenia (based on total psoas muscle density by Hounsfield unit average calculation, HUAC. Sarcopenia for males < 39.9 HU and for females < 38.1)
|
Parameter
|
Findings
|
Points
|
|
age in years
|
<= 55 years
|
0
|
|
|
56 to 65 years
|
2.5
|
|
|
66 to 75 years
|
5.8
|
|
|
>= 76 years
|
10
|
|
preoperative hemoglobin
|
>= 12.5 g/dL
|
0
|
|
|
< 12.5 g/dL
|
5.1
|
|
ECOG
|
0
|
0
|
|
|
1 to 4
|
3.6
|
|
sarcopenia
|
Absent
|
0
|
|
|
present
|
6.7
|
total score =
= SUM(points for all 4 parameters)
Interpretation:
• minimum score: 0
• maximum score: 25.4
• The higher the score the greater the 1-year mortality rate.
percent mortality at 1-year =
= (0.0647 * ((score)^2)) - (0.2595 * (score)) + 5.575
Performance:
• The area under the ROC curve was 0.70.
