Table 2.

Comparison of clinical findings of C. difficile infections of A⁺B⁺CDT^- isolates and A⁺B⁺CDT⁺ isolates

A⁺B⁺CDT^-, toxin A and toxin B-positive binary toxin-negative; A⁺B⁺CDT⁺, toxin A and toxin B-positive binary toxin-positive; CDI, Clostridium difficile infection.

^aBy Fisher's exact test for categorical variables and by Mann-Whitney U-test for continuous variables.

^bSeverity score is sum of 4 point; old age, fever, hypoalbuminemia, and leukocytosis got 1 point each.

^cDefined as an age of > 60 years.

^dDefined as a temperature of > 38.3℃.

^eDefined as an albumin level of < 2.5 mg/dL.

^fDefined as a WBC count of > 15,000 cells/mm³.

^gMore than 2 points of severity score regarded as severe CDI.

^hThe denominator comprised the patients who were performed endoscopy.