Table 1.

Definitions used in the analysis and findings

Systematic screening for active TB	“The systematic identification of people with suspected (presumptive) active TB, in a predetermined target group, using tests, examinations or other procedures that can be applied rapidly. Among those screened positive, the diagnosis needs to be established by one or several diagnostic tests and additional clinical assessments, which together have high accuracy.” [5]
A screening tool	Tests, examinations or other procedures used for systematic screening for active TB. Examples of TB screening tools include a structured symptom-based questionnaire, chest radiography (CXR) or an algorithm [3]. Algorithms may include sequential or parallel tests. With sequential tests, only those who screen positive with the initial test receive a second test. With parallel tests, those who screen positive on any of the tests are regarded as positive screens
A diagnostic tool	Tests, examinations or other procedures used to establish a diagnosis of TB in people identified with presumptive TB. Examples of TB diagnostic tools include a clinical algorithm, sputum smear microscopy, Xpert MTB/RIF assay or culture [3]
TB symptom(s)	Any TB symptom, e.g. cough, fever, night sweats, weight loss or combination of TB symptoms as defined by the study authors
Care seeking	People seeking care for a perceived health problem
TB care seeking	People seeking care for TB symptoms specifically
A risk group	Any group of people in which the prevalence or incidence of TB is significantly higher than in the general population. Examples of risk groups include a whole population within a geographical area or TB contacts [5]
A clinical risk group	Individuals who are diagnosed with a specific disease or condition that increases their risk for TB, e.g. PLHIV
Presumptive TB	Identified when a provider identifies a patient with suspected active TB. In the context of screening, a person who screens positive is a presumptive TB case