TABLE 4.

Sensitivity of Xpert C. difficile versus enzyme immunoassays for specific PCR ribotypesa

RibotypenXpert C. difficileEnzyme immunoassayP valueb
No. positiveNo. negativeSensitivity (%)No. positiveNo. negativeSensitivity (%)
0018801006275.00.46
0021313010021115.4<0.0001
0171110190.97463.60.311
02774740100581678.4<0.0001
053121201008466.70.093
078119281.87463.60.635
10465183.33350.00.545
1061612475.031318.80.004
Other ribotypes124115992.7715357.3<0.0005
  • a Includes data from site 6 to maximize the number of ribotype comparisons but is limited only to those isolates for which a known PCR ribotype could be established.

  • b Fisher's exact test.