WHO Global Task Force on TB Impact Measurement
What is the Task Force framework for systematic assessment of TB surveillance data?
The framework consists of a systematic and standardized approach to the measurement of TB incidence, combining periodic assessment of data quality, the case detection rate (i.e. the proportion of incident TB cases accounted for in TB notification data) and analysis of the extent to which trends in TB notifications are a proxy of trends in TB incidence. If application of the framework shows that all (or almost all) cases of TB are accounted for in notification data, then notification data can be certified or accredited as providing a direct measure of TB incidence.
Figure 1. Framework for assessment of TB incidence (its absolute value and trends)