Table 2.

Classification definitions used to identify study participants groups.

Classification	Definition
Definite TB	Sputum culture-positive for MTB.OR2 positive smears and symptoms responding to TB treatment.OR1 positive smear plus CXR suggestive of PTB
Probable TB	1 positive smear and symptoms responding to TB treatment.ORCXR evidence and symptoms responding to TB treatment.
ORD	Negative cultures, negative smears, negative CXR and treatmentnever initiated by healthcare providers

CXR, chest X-ray; MTB, Mycobacterium tuberculosis; ORD, other respiratory disease; TB, pulmonary TB. (Reproduced from Chegou et al., Thorax 2016) (20).