Contingency table of automated (Aklides and Helios) and visual antinuclear antibodies assessment
| Visual interpretation | ||||
|---|---|---|---|---|
| Positive | Negative | Total | ||
| Automated interpretation by Aklides | ||||
| Positive | 476 | 193 | 669 | PPV: 71% |
| Negative | 57 | 282 | 339 | NPV: 83% |
| Sensitivity: 89% | Specificity: 59% | |||
| Automated interpretation by Helios | ||||
| Positive | 464 | 220 | 684 | PPV: 68% |
| Negative | 69 | 255 | 324 | NPV: 79% |
| Sensitivity: 87% | Specificity: 54% | |||
| Total | 533 | 475 | 1008 | |
NPV, negative predictive value; PPV, positive predictive value.