smearnegative
cases. For smear-negative cases, the incremental increase in sensitivity from testing a second specimen was
27·8% for MTB/RIF, compared with 13·8% for culture. The specifi city of MTB/RIF was 98·8% (97·6–99·9). MTB/
RIF results were available in median 1 day (IQR 0–4) compared with median 12 days (9–17) for culture (p