Figure 3From: Risk factors for pulmonary tuberculosis in patients with chronic obstructive airway disease in Taiwan: a nationwide cohort study Curves of time to commencement of anti-TB treatment. The curves of time to commencement of anti-TB treatment generated by the Kaplan-Meier method among cases of chronic obstructive pulmonary disease (COPD) selected under scenario 5 and the control subjects.Back to article page