Table 4. Sensitivity, specificity, and predictive values of norovirus co-contamination on crAssphage positive environmental surfaces and hand rinse samples*.
| Setting | Sample type | Source (no. samples) | Sensitivity, % | Specificity, % | PPV, % | NPV, % |
|---|---|---|---|---|---|---|
| Cruise ship† |
Swab sample |
Case cabin (80) | 23.4 | 45.5 | 38.0 | 29.4 |
| Public area (64) | 9.5 | 93.0 | 40.0 | 67.8 | ||
| Overall (144) |
19.1 |
72.4 |
38.2 |
50.0 |
||
| LTCFs‡ | Hand rinse sample | Resident (15) | 72.7 | 25.0 | 72.7 | 25.0 |
| HCW (15) | 28.6 | 87.5 | 66.7 | 58.3 | ||
| Overall (30) | 55.6 | 66.7 | 71.4 | 50.0 |
*HCW, healthcare worker; LTCF, long-term care facility; NPV, negative predictive value; PPV, positive predictive value. †This study ‡Park et al. (26).