Table 3—

Sensitivity of smear and culture in different sputum collection methods among a cohort of 78 patients with culture-proven pulmonary tuberculosis

Sputum collection methodsPatients subgroupsAllƒ
Extent ≤right upper lobeExtent >right upper lobe+
Without respiratory symptoms#With respiratory symptoms
SmearCultureSmearCultureSmearCultureSmearCulture
Two unsupervised sputa0 (0)5 (26)0 (0)19 (50)0 (0)18 (86)0 (0)42 (54)
Two unsupervised and one supervised sputa0 (0)11 (58)3 (8)30 (79)3 (14)19 (90)6 (8)60 (77)
Two unsupervised and one induced sputa0 (0)17 (89)3 (8)34 (89)3 (14)21 (100)6 (8)72 (92)
Two unsupervised, one supervised and one induced sputa0 (0)18 (95)3 (8)38 (100)4 (19)21 (100)7 (9)77 (99)
One unsupervised, one supervised and one induced sputa0 (0)18 (95)3 (8)38 (100)4 (19)21 (100)7 (9)77 (99)
  • Data are presented as n (%), where n represents frequency of positive results, and % represents sensitivity. #: n = 19; : n = 38; +: n = 21; ƒ: n = 78.