Table 2 Sensitivity, specificity and positive and negative predictive value using a 10TH percentile cut off
Percentile | N | Blink rate per minute | Sensitivity | Specificity | Correctly Classified | PPV | NPV |
|---|---|---|---|---|---|---|---|
10th | 101 | 37-87 | 100.00% | 0.00% | 36.98% | 22% | 63% |
9th | 94 | 28-36 | 92.47% | 10.98% | 41-.11% | 25% | 62% |
8th | 97 | 23-27 | 85.71% | 21.34% | 45.15% | 25% | 60% |
7th | 120 | 18-22 | 76.88% | 30.95% | 47.93% | 26% | 58% |
6th | 108 | 15-17 | 68.05% | 44.05% | 52.93% | 27% | 57% |
5th | 65 | 13-14 | 58.70% | 55.03% | 56.39% | 29% | 56% |
4th | 105 | 10-12 | 52.21% | 61.13% | 57.83% | 31% | 54% |
3rd | 131 | 7-9 | 43.12% | 71.80% | 61.19% | 33% | 55% |
2nd | 88 | 5-6 | 27.27% | 82.47% | 62.06% | 34% | 56% |
1st | 132 | 0-4 | 16.10% | 89.33% | 62.25% | 35% | 83% |
base | 0 | 0.00% | 100.00% | 63.02% |