Characteristics of individuals referred to Baltimore City Health Department TB Clinic for evaluation of suspected <i>M. tuberculosis</i> infection, by study period.

Abbreviations: SD, Standard Deviation. BCHD, Baltimore City Health Department. *Ethnicity data was based on referral documentation and/or initial evaluation at BCHD. P-value for global comparison of equality of proportions of ethnicities by χ2 test. †HIV test results are available only for those that came to BCHD for evaluation. HIV status not available for those who did not complete an LTBI evaluation at BCHD. **Includes referrals from other local health departments in Maryland and other states, as well as employment TB testing conducted through other BCHD programs.