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Table 4 Predicting the result of mycobacterial culture on smear reversion by four clinical factors.

From: Predicting results of mycobacterial culture on sputum smear reversion after anti-tuberculous treatment: a case control study

Conditions

Episodes of

Sm reversion

Cul (+) for Mtb

Se

Sp

PPV

NPV

All

1

1

5%

100%

100%

72%

Any three

1

1

5%

100%

100%

72%

Any two

33

21

95%

78%

64%

98%

Anyone

61

22

100%

28%

36%

100%

  1. Abbreviation: Cul, culture; Mtb, Mycobacterium tuberculosis; NPV, negative predictive value; PPV, positive predictive value; Se, sensitivity; Sm, smear; Sp, specificity
  2. The four clinical factors include: 1) any one-drug resistance; 2) smear reversion within 2 months after treatment; 3) smear reversion before culture conversion; and 4) no radiographic improvement before smear reversion
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BMC Infectious Diseases

ISSN: 1471-2334

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