Table 5. Risk factors for reduced pulmonary function in patients previously treated for pulmonary tuberculosis.^a .

Risk factor	OR	95% CI	p
Recurrence of tuberculosis: yes vs. no.	4.33	1.86-10.11	< 0.001
Age: < 50 years vs. ≥ 50 years	3.77	1.95-7.25	< 0.001
Positive culture in the pastb: yes vs. no	3.5	1.72-7.11	< 0.001
Education: high school only vs. college education	2.11	1.03-4.33	0.04
Smoking: ever vs. never	1.57	0.82-3.0	0.17
Gender: male vs. female	1.49	0.79-2.81	0.21

^aDefined as an FEV₁ below the lower limit of normal. ^bDetermined for only 195 of the 214 patients in the sample.