Performance of screening tools for undiagnosed tuberculosis* (N = 867).

Data are percentages unless otherwise indicated. *Undiagnosed tuberculosis defined as participants fulfilling the case definition of definite or probable tuberculosis. † Denominator = 867 unless otherwise indicated (10 participants on tuberculosis treatment at enrolment, 39 “possible” tuberculosis cases, 3 participants without sputum cultures at enrolment and 62 with missing chest radiographs at enrolment were excluded). ∫Any CXR abnormality = active tuberculosis 89 (61.0%); previous tuberculosis 23 (15.8%); trauma/bullets 16 (11.0%); abnormal cardiac silhouette 9 (6.2%); other 9 (6.2%). ‡Any of cough >2 weeks, night sweats or unintentional weight loss. §Any of current cough, fever, unintentional weight loss or night sweats (WHO symptom screen for people with HIV [25]). NPV = negative predictive value; PPV = positive predictive value; WHO = World Health Organization; CXR = Chest radiograph; TB = tuberculosis.