Menzenbach et al reported a score for preoperative screening to identify a patient at risk for postoperative delirium. The authors are from University of Bonn in Germany.
PROPDESC refers to PRe-Operative Prediction of postoperative DElirium by appropriate SCreening
Patient selection: preoperative
Parameters:
(1) age in years
(2) ASA classification (ASA 5 not listed in data)
(3) NYHA classification
(4) surgical risk
(5) serial subtracting, from 0 to 3 points (using Montreal Cognitive Assessment, MoCA)
(6) repetition of two sentences (using MoCA)
Parameter
Finding
Points
age in years
age
ASA
10 * ((ASA class)-1)
NYHA
10 * ((NYHA class)-1)
surgical risk
low
0
intermediate
40
high
60
serial subtracting
-5 * (score)
sentence repetition
-5 * (score)
where:
• This is a "best guess" based on the cryptic description in Table 4.
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: -25
• maximum score: at least 200 (depends on age)
Total Score
Delirium Risk
< 125
< 10%
125 to 144
10-20%
145 to 154
20-30%
155 to 164
30-40%
165 to 174
40-50%
>= 175
> 50%
Performance:
• The area under the ROC curve was 0.75 in the derivation and 0.73 in the validation cohorts.
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