TABLE 2

Comparison of four molecular tests to TBC/CCNA for detection of toxigenic C. difficilea

TestNo. of specimens at siteNo. of specimens with result% sensitivity (CI)% specificity (CI)
TPFPTNFN
Portrait54010931398298.2 (93–99)92.8 (89–95)
Gene Xpert27558181990100 (93–100)91.7 (87–95)
GeneOhm169372129197.4 (86–99)98.5 (94–99)
Illumigene9614477193.3 (68–99)95.1 (87–98)
  • a TP, true positive; FP, false positive; TN, true negative; FN, false negative; CI, 95% confidence interval.