Table 2 Frequency of hepatotoxicity according to severity and onset of antituberculosis drug-induced hepatotoxicity.

From: Association of PXR and CAR Polymorphisms and Antituberculosis Drug-Induced Hepatotoxicity

 

N (total = 203)

Proportion

Severity of hepatotoxicity

   Grade 1 (ALT 2–2.5 times ULN)

52

25.6%

   Grade 2 (ALT 2.5–5 times ULN)

78

38.4%

   Grade 3 (ALT 5–10 times ULN)

35

17.2%

   Grade 4 (ALT > 10 × ULN)

38

18.7%

Onset of hepatotoxicity after antituberculosis drug usage

   <30 days

104

51.2%

   30–60 days

60

29.6%

   60–90 days

14

6.9%

   >90 days

25

12.3%

  1. Severity of hepatotoxicity is classified according to the WHO Toxicity Classification Standards. The criterion for grade 1 was modulated to 2–2.5 times ULN in this study.
  2. ULN: upper limit of normal.