Lu et al reported a nomogram for predicting urinary tract infection in the 90 days after radical cystectomy with urinary diversion. This can help to identify a patient who be monitored more closely. The authors are from Southeast University Nanjing in China.
Patient selection: status post radical cystectomy with urinary diversion for bladder cancer
Parameters:
(1) type of urinary diversion
(2) Charlson comorbidity index (CCI)
(3) ureteroenteric stricture
(4) prognostic nutritional index (PNI) of Onodera et al, from 25 to 65
points for PNI =
= MAX(0,162.5 - (2.5 * (PNI)))
|
Parameter
|
Finding
|
Points
|
|
type of urinary diversion
|
continuous cutaneous diversion
|
0
|
|
|
orthotopic neobladder
|
19.8
|
|
|
ileal conduit
|
25
|
|
Charlson comorbidity
|
0 or 1
|
0
|
|
|
>= 2
|
13.9
|
|
stricture
|
no
|
0
|
|
|
yes
|
46.7
|
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 185.6
value of X =
= (0.0654 * (score)) - 5.522
probability of UTI within 90 days =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.86.
