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Table 2 Comparison of sputum smear-positive results and positive Xpert® MTB/RIF assay results, by age

From: Evaluation of the Xpert® MTB/RIF assay and microscopy for the diagnosis of Mycobacterium tuberculosis in Namibia

Age group Xpert® result
Positive
No. %
Below 20 years Sputum smear-positive 10 62.5
Total 16 100.0
Between 20 and 40 years Sputum smear-positive 210 78.9
Total 266 100.0
Between 40 and 60 years Sputum smear-positive 169 71.3
Total 237 100.0
Above 60 years Sputum smear-positive 51 71.8
Total 71 100.0
Total (defined as Xpert® positive) 440 74.6
Total 590 100.0