Annual incidence rate of TB casesThe rate is expressed as the number of new TB cases (or new smear-positive PTB cases) per 100,000 population.
Numerator: number of new TB cases (all forms) that occur in a population over one year
Denominator: population at the start of the year
Annual incidence rate of smear-positive PTB casesThe rate is expressed as the number of new TB cases (or new smear-positive PTB cases) per 100,000 population.
Numerator: number of new smear-positive PTB cases that occur in a population over one year
Denominator: population at the start of the year
Prevalence of smear-positive PTB cases over a given period of time, usually one yearPrevalence is expressed as the number of smear-positive PTB cases per 100,000 population. It includes new and pre-existing cases. Prevalence represents approximately double the incidence rate.
Numerator: number of smear-positive PTB cases
Denominator: population at the start of the period of time
Proportion of multidrug- and rifampicin-resistant TB cases among TB cases over a given period of timeProportion is expressed in %.
Numerator: number of multidrug- and rifampicin-resistant TB cases
Denominators:
- Total number of TB cases
- Number of new TB cases
- Number of previously treated TB cases
Proportion of extensively drug-resistant TB cases among TB cases over a given period of timeProportion is expressed in %.
Numerator: number of extensively drug-resistant cases
Denominators: as for multidrug- and rifampicin-resistant TB cases
Proportion of people with HIV infection among new TB cases over a given period of timeProportion is expressed in %.
Numerator: number of people with HIV infection
Denominator: number of new TB cases
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