Table 3.

Overview of the included systematic reviews.

Review	Primary outcome	Date of last search
Abubakar [17]	Number of contacts screened, and number of individuals with TBa infection and TB disease identified	November 2009
Fox et al [18]	Yield of TB disease and TB infection for both DS-TBb and DR-TBc source cases	October 2011
Shah et al [19]	Yield of TB infection and TB disease in contacts of DR-TB source cases	December 2011
Kodama et al [20]	Relative risk ratio of TB disease in DS-TB contacts compared with DR-TB contacts	Not reported
Svadzian et al [21]	Proportion of cases from those evaluated through universal testing (all individuals in the study received DSTd) and those evaluated through selective testing (only the high-risk group received DST)	June 2019
Chiang et al [22]	Percentage of secondary cases whose Mycobacterium tuberculosis strains were resistant to the same drugs as strains from the index cases	July 2018

^aTB: tuberculosis.

^bDS-TB: drug-susceptible tuberculosis.

^cDR-TB: drug-resistant tuberculosis.

^dDST: drug-susceptibility testing.