Table 2. The receiver-operating characteristic (ROC) curve efficacies and cutoff points of near vision acuity (NVA), distance vision acuity (DVA) and the series combined test.
| Disease | Method | AUC* | criterion | YI § | Se. ¥ | Sp. ＄ | PPV ※ | NPV ＃ |
|---|---|---|---|---|---|---|---|---|
| High hyperopia (N = 38) | DVA | 0.77 | ≤20/32 | 0.50 | 89.5 | 60.6 | 1.93 | 99.85 |
| NVA | 0.85 | ≤20/25 | 0.60 | 81.6 | 78.9 | 3.24 | 99.80 | |
| Combined | 0.86 | DVA≤20/32 NVA ≤20/25 | 0.64 | 78.9 | 84.8 | 4.30 | 99.78 | |
| High myopia (N = 377) | DVA | 0.95 | ≤20/50 | 0.79 | 97.1 | 81.7 | 33.15 | 99.67 |
| NVA | 0.91 | ≤20/25 | 0.70 | 85.9 | 84.3 | 33.86 | 98.47 | |
| Combined | 0.97 | DVA≤20/63 NVA ≤20/20 | 0.79 | 87.8 | 90.7 | 46.95 | 98.76 | |
| High astigmatism (N = 107) | DVA | 0.77 | ≤20/32 | 0.48 | 86.9 | 61.3 | 5.28 | 99.47 |
| NVA | 0.85 | ≤20/25 | 0.63 | 83.2 | 79.9 | 9.30 | 99.48 | |
| Combined | 0.87 | DVA≤20/25 NVA ≤20/25 | 0.64 | 81.3 | 83.1 | 10.65 | 99.44 | |
| All SREs ○ (N = 486) | DVA | 0.91 | ≤20/40 | 0.70 | 91.2 | 76.8 | 32.69 | 98.60 |
| NVA | 0.91 | ≤20/25 | 0.71 | 85.2 | 86.2 | 43.26 | 97.92 | |
| Combined | 0.95 | DVA≤20/32 NVA ≤20/25 | 0.76 | 83.5 | 92.6 | 58.25 | 97.85 |
Note: *AUC: area under the curve
§YI: Youden Index
¥Se.: Sensitivity
＄Sp.: Specificity
※PPV: positive predictive value
＃NPV: negative predictive value
○SREs: significant refractive errors