Figure 1.

Flow chart of cases included in this study from the national health insurance claims data. Treatment case was defined with prescription records of at least three anti-tuberculosis (TB) medications. Any consecutive prescription records with more than 180 days of interval were defined as separate treatment cases. Likewise, drug susceptibility testing (DST) cases was defined with prescription records of DST. Any consecutive prescription records with more than 90 days of interval were defined as separate DST cases. After applying clearing period of 2007 to treatment cases, treatment cases and DST cases were matched in each TB patients, and only cases with prescription records of DST within 6 months after treatment initiation were defined as culture-confirmed pulmonary TB cases.