TABLE 1.
IDI-MRSA diagnostic performance compared to enrichment culture for MRSA detection in hospitalized patientsa
| Sample type (no. of specimens) and IDI-MRSA result | No. of samples tested by using culture and enrichment broth
|
%
|
PPV | NPV | ||
|---|---|---|---|---|---|---|
| Positive | Negative | Sensitivity | Specificity | |||
| Nasal swabs (522) | ||||||
| Positive | 29 | 14 | 90.6 | 97.1 | 67.4 | 99.4 |
| Negative | 3 | 476 | ||||
| Other samples (475) | ||||||
| Positive | 52 | 13 | 76.5 | 96.8 | 80.0 | 96.1 |
| Negative | 16 | 394 | ||||
| All specimens (997) | ||||||
| Positive | 81 | 27 | 81.0 | 97.0 | 75.0 | 97.9 |
| Negative | 19 | 870 | ||||
| Patients (466) | ||||||
| Positive | 42 | 20 | 89.4 | 95.2 | 67.7 | 98.8 |
| Negative | 5 | 399 | ||||
a
PPV, positive predictive value; NPV, negative predictive value.