TABLE 3.
Comparison of the cobas Cdiff test with combined direct and enrichment cultureb
| cobas Cdiff test result | No. of speicmens with result |
Total no. of specimens | |
|---|---|---|---|
| Positive by combined direct and enrichment culture | Negative by combined direct and enrichment culture | ||
| Positive | 131 | 7 | 138 |
| Negative | 10 | 534 | 544 |
| Total | 141 | 541 | 682a |
a
One sample had an insufficient sample volume for repeat testing and is not included.
b
The sensitivity and specificity of the results of the cobas Cdiff test were 92.9% (131/141 samples; 95% CI, 87.4% to 96.1%) and 98.7% (534/541 samples; 95% CI, 97.4% to 99.4%), respectively. The positive and negative predictive values of the cobas Cdiff test were 94.9% (95% CI, 89.9% to 97.5%) and 98.2% (95% CI, 96.6% to 99.0%), respectively.