Table 7.

Risk factors for grade 2 or 3 stenosis after treatment

Variables	Univariate			Multivariate†
	Odds ratio	95% Confidence interval	P-value	Odds ratio	95% Confidence interval	P-value
Age, ≥50 years old	0.99	0.96–1.02	0.570	0.79	0.28–22.68	0.891
Sex, female	2.34	1.01–5.40	0.047	2.66	0.72–98.41	0.595
Cough, present	1.50	0.63–3.59	0.364	1.82	0.03–105.83	0.774
Symptom duration, ≥4 weeks	0.73	0.34–1.87	0.601	2.63	0.17–40.88	0.490
Previous history of PTB, none	1.57	0.44–5.67	0.491	10.89	0.01–951.32	0.490
Atelectasis on CXR, present	2.65	0.86–8.21	0.091	5.57	0.02–189.73	0.564
Cavity on CXR, present	0.80	0.27–2.84	0.687	3.51	0.05–264.10	0.569
Severity by CXR, moderate or far advanced	1.17	0.47–9.28	0.742	1.05	0.02–63.90	0.359
Initial FEV1, <80% of the predicted value	6.98	1.74–28.07	0.006	4.97	1.01–23.06	0.041
Length of involvement, ≥20 mm	5.68	2.22–14.83	0.000	16.33	1.90–141.10	0.011
Type of EBTB, actively caseating	1.94	0.87–4.33	0.107	4.32	0.10–179.51	0.442
Level of involvement, multiple	2.15	0.99–4.64	0.052	20.60	0.24–181.30	0.185
Initial stenosis, grade 2 or 3	1.33	0.56–3.14	0.518	0.14	0.00–66.40	0.243

^†Adjusted by all other variables in the table.

EBTB, endobronchial tuberculosis; PTB, pulmonary tuberculosis; CXR, chest X-ray; FEV1, forced expiratory volume in 1 s.