Table 5.
Sensitivity, Specificity, and FPR for the Classification of Individuals as Moderately Severely Depressed (PHQ-9 ≥ 15) Versus Less (PHQ-9 < 15) at Each Given Cutoff Value of the Epworth Sleepiness Scale.
| Epworth cutoff value | Sensitivity | Specificity | FPR |
|---|---|---|---|
| 1 | .97 | .08 | .92 |
| 2 | .97 | .14 | .86 |
| 3 | .93 | .24 | .76 |
| 4 | .90 | .33 | .67 |
| 5 | .87 | .42 | .58 |
| 6 | .87 | .50 | .50 |
| 7 | .77 | .62 | .38 |
| 8 | .63 | .70 | .30 |
| 9 | .50 | .76 | .24 |
| 10 | .50 | .81 | .19 |
| 11 | .43 | .85 | .15 |
| 12 | .33 | .88 | .12 |
| 13 | .33 | .91 | .09 |
| 14 | .33 | .95 | .05 |
| 15 | .23 | .97 | .03 |
| 16 | .20 | .98 | .03 |
| 17 | .17 | .98 | .02 |
| 18 | .13 | .99 | .01 |
| 19 | .10 | .99 | .01 |
| 20 | .01 | .99 | .01 |
| 22 | .00 | 1.00 | .00 |
| 25 | .00 | 1.00 | .00 |
Note. Epworth = Epworth Sleepiness Scale; FPR = false positive rate, or (1 – specificity); PHQ-9 = Patient Health Questionnaire-9.