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Table 2 Sensitivity, specificity and positive and negative predictive value using a 10TH percentile cut off

From: Blink rate is associated with drug-induced parkinsonism in patients with severe mental illness, but does not meet requirements to serve as a clinical test: the Curacao extrapyramidal syndromes study XIII

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%