Chest roentgenography is complementary to interferon-gamma release assay in latent tuberculosis infection screening of rheumatic patients

Table 3 The association between IGRA results and chest radiologic findings of healed tuberculous infections

IGRA	Positive N = 46	Negative N = 178	Indeterminate N = 14
Age	57.9 ± 11.2	51.7 ± 15.6 ^a	59.2 ± 11.1
Sex (M/F)	19/27	52/126	2/12
CXR-old-TB n (%)	11 (23.9)^b,c	30 (16.9) ^d	2 (14.3) ^e
Fibrotic lesions	7^c	17	2
Calcified nodules	3	10	0
Local bronchiectasis	1	6	0
Thin wall cysts	1	0	0
Hilar calcifications	0	0	0

^a p < 0.01 by ANOVA
^b Positive vs negative: odd ratio 1.55, 95% CI: 0.71–3.39, p = 0.27
^c One subject had Mycobacterium gordonae colonization; Two subjects had previous history of complete pulmonary tuberculosis treatment
^d One subject had Mycobacterium tuberculosis infection during follow-up period
^e One subject had previous history of complete pulmonary tuberculosis treatment
IGRA interferon gamma release assay, CXR-old-TB radiographic findings suggestive of pulmonary tuberculosis sequelae

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