Wang et al reported a nomogram for predicting a cystobiliary communication following hydatid liver cyst surgery. The authors are from Qinghai University and the Qinghai Province Key Laboratory of Hydatid Disease Research in China.
Patient: status post hydatid liver cyst surgery
Parameters:
(1) serum GGT in U/L
(2) serum alkaline phosphatase (ALK) in U/L
(3) cyst size in cm
(4) location of the cyst
Parameters
Finding
Points
serum GGT
< 46 U/L
0
46 to 120 U/L
6.9
121 to 180 U/L
12.2
181 to 240 U/L
17.5
> 240 U/L
42
serum ALK
< 126 U/L
0
126 to 250 U/L
42.3
251 to 375 U/L
50.3
376 to 500 U/L
53.7
> 500 U/L
100
cyst diameter
< 7.5 cm
0
7.5 to 8.4 cm
12.2
8.5 to 9.4 cm
23.8
9.5 to 10.4 cm
36.9
10.5 to 11.4 cm
44.9
>= 11.5 cm
56.4
location
non-portal
0
portal
37.4
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 235.8
value of X =
= (0.02707 * (score)) - 3.045
probability of a cystobiliary communication =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.79.
To read more or access our algorithms and calculators, please log in or register.
