Fig. 3From: The value of Xpert MTB/RIF assay of urine samples in the early diagnosis of smear-negative urinary tuberculosisComparison with smear-negative results. + positive − negative n number CRS composite reference standard AFB Acid-Fast Bacilli smears Xpert Xpert MTB/RIF culture culture for MTB TB-DNA Mycobacterium tuberculosis deoxyribonucleic acid N.S. p > 0.05 *P < 0.1 **P < 0.01 ***P < 0.001Back to article page