Table 3.

Multiple logistic regression analysis of the relationship between nontuberculous mycobacteria infection and occupational, clinical, and radiological characteristics.

		Unadjusted Model		Model 1 †		Model 2 ‡
		OR	95% CI	OR	95% CI	OR	95% CI
Age (per year)		1.02	0.99–1.05	1.01	0.98–1.05	1.01	0.98–1.05
Work duration, years
	<20	1.00		1.00		1.00
	≥20	1.12	0.71–1.76	0.92	0.53–1.59	0.89	0.51–1.55
History of pulmonary tuberculosis
	No	1.00		1.00		1.00
	Yes	2.29 *	1.34–3.84	1.82 *	1.03–3.16	1.71	0.95–3.01
Bronchiectasis
	No	1.00		1.00		1.00
	Yes	1.90 *	1.00–3.38	0.99	0.43–2.03	1.01	0.44–2.09
Pulmonary cavity on chest CT
	No	1.00		1.00		1.00
	Yes	1.51	0.77–2.76	1.47	0.69–2.90	1.34	0.62–2.70
Profusion of small opacities
	0	1.00		1.00
	1	1.48	0.68–3.47	1.22	0.47–3.36
	2	3.48 *	1.75–7.72	2.79 *	1.25–7.10
	3	4.02 *	1.62–10.24	3.76 *	1.36–10.94
Grade of large opacities
	No	1.00				1.00
	A	2.92	1.56–5.27			2.32 *	1.01–4.99
	B	2.74	1.53–4.81			2.68 *	1.35–5.24
	C	7.15 *	3.15–15.11			7.58 *	3.02–17.95

* Statistically significant values (p < 0.05). ^† Model 1: Adjusted for age, work duration, history of pulmonary tuberculosis, bronchiectasis, pulmonary cavity, and profusion of small opacities. ^‡ Model 2: Adjusted for age, work duration, history of pulmonary tuberculosis, bronchiectasis, pulmonary cavity, and grade of large opacities. OR, odds ratio; CI, confidence interval.