Incidence

Incidence is an epidemiological measure of the occurrence of new cases of a disease in a population over a specified period of time. Tuberculosis (TB) incidence is the number of new cases of active TB disease during a certain time period (usually a year), and is better expressed as a rate, as shown in the figure below.

Figure: Deriving the Incidence of TB Disease for a Given Population

Tuberculosis incidence varies considerably in different populations and population segments.

In 2021, the Global TB incidence was 134 (125-143) per 100,000. The TB Incidence rate of India is  - 210 (178-244) per 100,000 in 2021 according to WHO Global TB Report 2022.

Resources

• India TB Report, 2022.
• Epidemiologic Basis of Tuberculosis Control, Hans L. Rieder, 1999.
• Morbidity Frequency Measures, Centers for Disease Control and Prevention.
• Global Tuberculosis Report 2022.