Gu et al reported the CHAT score for identifying a patient at risk for venous thromboembolism following hernia surgery. The authors are from Shanghai Jiao Tong University, Capital Medical University and Shandong First Medical University in China.
CHAT is an acronym for Chinese Hernia Adult Thromboembolism
Patient selection: Chinese adult undergoing hernia surgery
Parameters:
(1) varicose veins of lower extremity
(2) history of venous thromboembolism (VTE)
(3) family history of thrombosis
(4) reducible hernia
(5) interruption of antithrombotic agents
Parameters
Findings
Points
varicose veins
no
0
yes
5
history of VTE
no
0
yes
4
family history of thrombosis
no
0
yes
8
reducible hernia
no
0
yes
-4
interruption of anti-thrombotic agents
no
0
yes
4
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: -4
• maximum score: 21
• A score >= 5 is associated with a high risk of venous thromboembolism.
Performance:
• The area under the ROC curve is 0.81.
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