Huang and Cao reported a nomogram for predicting intraoperative blood transfusion for a patient undergoing gastric cancer surgery. Perioperative blood transfusion may have a negative effect on the patient's prognosis. The authors are from Sun Yat-sen Memorial Hospital in Guangdong, China.
Patient selection: gastric cancer surgery, without distant metastases
Parameters:
(1) ASA status from I to IV
(2) comorbidities
(3) tumor location in stomach
(4) cTNM stage
(5) preoperative hemoglobin in g/L
Parameter
Finding
Points
ASA status
I or II
0
III or IV
15
comorbidities
no
0
yes
13
tumor location
lower
0
middle
32
upper
18
diffuse
39
cTNM stage
I
0
II
18
III
19
hemoglobin
> 120 g/L
0
110 to 119
26
100 to 109
43
90 to 99
65
80 to 89
93
< 80 g/L
100
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 186
value of X =
= (0.03708 * (score)) - 3.734
probability of intraoperative blood transfusion =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.86 for derivation and 0.85 for validation cohorts.
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