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Confusion Matrix for Reference Standard According to Human Grading and Device Output; Sensitivity, Specificity, and Predictive Values of the Algorithm.
| Device output | ||||
|---|---|---|---|---|
| Human reference standard | mtmDR | Not mtmDR | Total | Sensitivity, specificity |
| mtmDR | 180 | 4 | 184 | 97.8% sensitivity |
| Not mtmDR | 191 | 304 | 495 | 61.4% specificity |
| All | 371 | 308 | 679 | |
| Predictive value | 48.5% PPV | 98.7% NPV | ||
Abbreviations: mtmDR, more than mild diabetic retinopathy; NPV, negative predictive value; PPV, positive predictive value.
