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Table 1 Comparison of performance of GeneXpert C. difficile test and C. difficile culture followed by toxin PCR for samples tested during the study period

From: False Negative Results in Clostridium difficile Testing

 

Culture

+

-

Xpert

+

233

62

-

50

1963

Sensitivity

82 %

 

Specificity

97 %

PPV

79 %

NPV

99 %

Agreement

95 %

Kappa

0.78