Pericardial fluid type | Indeterminate rate (number/total number of assays performed) | Internal positive controlaCT-value (median, IQR) | Xpert MTB/RIF positive tests in definite and probable-TB patients |
---|---|---|---|
Unconcentrated (1 ml) | 2.1% (0.3 to 4.6) 3/138 | 26.2 (25.1 to 27.4) | 41.0% (32.1 to 49.9) 48/117 |
Concentrated/centrifuged pellet (20 ml) | 10.4% (5.3 to 15.6) 14/134 | 26.2 (25.1 to 27.6) | 52.9% (43.9 to 62.0) 62/117 |
P-valueb | 0.005 | 0.9 | 0.07 |