Mello et al evaluated patients for sputum smear negative pulmonary tuberculosis. They reported a CART model for patients with a chest X-ray showing changes not typical for tuberculosis. The authors are from Federal University of Rio de Janeiro, Johns Hopkins University, and University of Sao Paulo.
Patient selection: sputum smear negative for acid-fast bacilli, chest X-ray atypical for tuberculosis (TB)
Analysis: classification and regression tree (CART)
Parameters:
(1) age in years
(2) sputum production
(3) chest pain
Age
Sputum
Chest Pain
Percent TB
< 67
No
No
33%
< 67
No
Yes
64%
< 56
Yes
NA
33%
56 to 66
Yes
NA
80%
>= 67
NA
NA
11%
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