TABLE 4.

Demographic information for 8 subjects with discordant results of culture and the Xpert MTB/RIF assay^a

Test, result, and subject	Gender	Age (yrs)	Previous TB history	Current DR result	Grade
Xpert MTB/RIF
Xpert MTB/RIF positive and culture negative (2 subjects)
Subject 1	Male	71	Yes	Radiographic abnormality suggestive of active TB	Extremely low
Subject 2	Male	68	No	Radiographic abnormality suggestive of active TB	Extremely low
Xpert MTB/RIF positive and culture contaminated (2 subjects)
Subject 3	Female	65	No	Normal	Extremely low
Subject 4	Male	66	No	Radiographic abnormality suggestive of active TB	Extremely low
Culture
Xpert MTB/RIF negative and culture positive (4 subjects)
Subject 5	Male	73	Yes	Radiographic abnormality suggestive of prior TB	1+
Subject 6	Male	69	No	Radiographic abnormality suggestive of active TB	1
Subject 7	Male	63	No	Radiographic abnormality suggestive of active TB	2+
Subject 8	Female	63	No	Radiographic abnormality suggestive of prior TB	4

^aDR, digital radiography; TB, tuberculosis.