Davatchi et al reported a simple score for the diagnosis of Behcet's disease based on a classification tree. The authors are from Tehran University of Medical Sciences and Shariati Hospital in Tehran.
Parameters:
(1) ocular lesions
(2) oral aphthosis
(3) genital aphthosis
(4) pathergy phenomenon
(5) skin manifestations
Parameter
Finding
Points
ocular lesions
no
0
yes
5
oral aphthosis
no
0
yes
4
genital aphthosis
no
0
yes
3
pathergy
no
0
yes
2
skin manifestations
no
0
yes
1
total score =
= SUM(points for all 5 parameters)
Interpretation:
• minimum score: 0
• maximum score: 15
• A score >= 7 indicates Behcet's disease.
Classification Tree Used in Iran
Oral Aphthosis
Genital Aphtosis
Ocular Signs
Pathergy
Skin
Diagnosis
yes
yes
NA
NA
NA
Behcet
yes
no
yes
NA
NA
Behcet
yes
no
no
yes
yes
not Bechet
yes
no
no
yes
no
Behcet
yes
no
no
no
NA
not Bechet
no
NA
no
NA
NA
not Behcet
no
NA
yes
yes
NA
Behcet
no
yes
yes
no
NA
Behcet
no
no
yes
no
NA
not Behcet
Performance:
• The authors claim a sensitivity of 97.2% and specificity of 96.7%.
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