Table 4.
Phase II test method accuracy: results for all laboratories combined
| EPA | GHS | |
|---|---|---|
| Accuracy | 89% (23/26a) | 89% (23/26 a) |
| Sensitivity | 100% (14/14) | 100% (13/13) |
| Specificity | 75% (9/12) | 77% (10/13) |
| False Positive | 25% (3/12) | 23% (3/13) |
| False Negative | 0% (0/14) | 0% (0/13) |
| Negative Predictivity | 100% (9/9) | 100% (10/10) |
| Positive Predictivity | 82% (14/17) | 81% (13/16) |
a
Four chemicals were excluded from the analysis: three chemicals were identified as foaming agents in the pre-screen evaluation, and no overall call could be made for the fourth chemical.