Tuberculosis (TB) is a disease caused by bacteria called Mycobacterium tuberculosis that usually affects the lungs. TB bacteria are spread when they are put into the air when a person with TB disease of the lungs or throat coughs or speaks. People nearby may breathe in these bacteria and become infected. If not treated properly, TB disease can be fatal. An effective strategy to ensure patients complete TB treatment is directly observed therapy (DOT). With DOT, a patient meets with a health care worker every day or several times a week. The patient takes the TB medication while the health care worker watches. There is no way to accurately predict whether a patient will adhere to treatment without this assistance. This measures looks at the proportion of patients being treated for TB who receive DOT.