Table 2.
Comparison of clinical isolate identification using Vitek 2 and molecular techniques.
| Vitek 2 system | Molecular technique | Total | |
|---|---|---|---|
| A. baumannii | A. baumannii complex | ||
| A. baumannii | 8 | 9 | 17 |
| A. baumannii complex | 15 | 46 | 61 |
| Total | 23 | 55 | 78 |
| Statistic | for A. baumannii | for A. baumannii complex | - |
| Kappa agreement | 0.20 † | 0.20 † | - |
| Sensitivity % | 83.64 | 34.78 | - |
| Specificity % | 34.78 | 83.64 | - |
| PPV % | 75.41 | 47.06 | - |
| NPV % | 47.06 | 75.41 | - |
| Accuracy % | 69.23 | 69.23 | - |
| p-value | 0.307 Mc NS | - | |
†
– slight agreement; Mc – McNemar test; NS – not significant.PPV – positive predictive value; NPV – negative value NPV; p – p-value