Rational use of Xpert testing in patients with presumptive TB: clinicians should be encouraged to use the test-treat threshold

Table 1 Categories for confirming and excluding power, and the corresponding effect on moving toward a higher or lower post-test probability on the log₁₀ odds scale

^aConfirming or excluding power can range between 1 and infinity. However, power is rarely 1000 or more
^bIf confirming power, add the respective number of steps, if excluding power, subtract steps (unit in log₁₀ odds)

ISSN: 1471-2334