Table 2.
Sensitivities, specificities, positive and negative predictive values for the six different culture methods, based on all 300 samples, and calculated for a number of 22 positive subjects on a total number of 100 subjects included.
| Culture Medium | % Sensitivity | % Specificity | % Positive predictive value | % Negative Predictive value |
|---|---|---|---|---|
| CNAa | 56 | 84 | 52 | 86 |
| GBSDA | 95 | 100 | 100 | 99 |
| CA | 100 | 96 | 87 | 100 |
| Lim broth + CNA | 78 | 84 | 60 | 93 |
| Lim broth + GBSDA | 96 | 100 | 100 | 99 |
| Lim broth + CA | 100 | 96 | 88 | 100 |
a: False positive on CNA: beta-hemolytic colonies which were CAMP negative.