Soto et al reported a score for identifying a patient who may have smear-negative pulmonary tuberculosis. The authors are from Hipolito Unanue National Hospital in Lima, Peru.
Parameters:
(1) hemoptysis
(2) weight loss
(3) age in years
(4) expectoration
(5) apical infiltrate on chest X-ray
(6) miliary infiltrate on chest X-ray
Parameter
Finding
Points
hemoptysis
absent
0
present
2
weight loss
absent
0
present
1
age in years
<= 45 years
0
> 45 years
-1
expectoration
absent
0
present
-1
apical infiltrate
absent
0
present
3
miliary infiltrate
absent
0
present
4
score =
= SUM(points for all 6 parameters)
Interpretation:
• minimum score: -2
• maximum score: 10
• A score >= 2 had a sensitivity of 70% and specificity of 82%.
• A score >= 4 had a sensitivity of 33% and specificity of 92%.
Performance:
• The area under the ROC curve was 0.83.
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