Table 2.

Microbiological, radiological, and pathological findings of 109 octogenarian patients with TB.

Characteristics	All(n = 109)	Pulmonary TB (n = 84)	Extrapulmonary TB (n = 25)	p-value
Microbiological findings
Positive AFB smear	18 (16.5)	18 (21.4)	0 (0.0)	0.011
Positive AFB culture	46 (42.2)	46 (54.8)	0 (0.0)	0.000
Positive TB-PCR assay	20 (18.3)	20 (23.8)	0 (0.0)	0.003
At least one positive mycobacterial test result	56 (51.4)	56 (66.7)	0 (0.0)	0.000
Radiologic findings
Active lesions suggestive of TB	35 (32.1)	33 (39.3)	2 (8.0)	0.013
Active lesions suggestive of conditions  other than TB§	57 (52.3)	39 (46.4)	18 (72.0)
Inactive lesions¶	17 (15.6)	12 (14.3)	5 (20.0)
Radiologically confirmed TB cases	57 (52.3)	51 (46.8)	6 (24.0)	0.001
Pathological findings consistent with TB	21 (19.3)	15 (17.8)	6 (24.0)	0.494

Data are presented as n (%).

SD, standard deviation; TB, tuberculosis; AFB, acid-fast bacilli; PCR, polymerase chain reaction.

^§Lesions suggestive of infection, malignant mass, lung nodule, or pleural effusion.

^¶Lesions such as fibrotic changes of lung parenchyma or atelectasis.