TABLE 1.

Performance of GDH test in stool specimens compared to C. difficile culture and/or PCR for gluDa

Comparative testResultGDH assay result% Sensitivity (95% CI)% Specificity (95% CI)% PPV (95% CI)% NPV (95% CI)
No. positiveNo. negative
CulturePositive1421093.4 (88.2-96.8)96.6 (95.5-97.5)75.9 (69.2-81.9)99.2 (98.6-99.6)
Negative451271
Culture and/or gluD PCRPositive1471093.6 (88.6-96.9)96.9 (95.9-97.8)78.6 (72.0-84.3)99.2 (98.6-99.6)
Negative401271
  • a NPV, negative predictive value; PPV, positive predictive value; 95% CI, 95% confidence interval.