Table 2.
Detection of AHI psg greater than 30 versus different thresholds of AHIas, at 3 month follow-up.
| AHI as, thresholds | TP: AHI psg > 30 and AHI as >threshold | FP: AHI psg ≤ 30 and AHI as >threshold | FN: AHI psg ≥ 30 and AHI as ≤thrshold | TN: AHI psg ≤ 30 and AHI as ≤threshold | Se | Sp | PPV | NPV |
|---|---|---|---|---|---|---|---|---|
| 10 | 8 | 17 | 0 | 0 | 100,0 | 0,0 | 32,0 | / |
| 15 | 8 | 9 | 0 | 8 | 100,0 | 47,1 | 47,1 | 100,0 |
| 20 | 8 | 6 | 0 | 11 | 100,0 | 64,7 | 57,1 | 100,0 |
| 25 | 8 | 6 | 0 | 11 | 100,0 | 64,7 | 57,1 | 100,0 |
| 30 | 8 | 4 | 0 | 13 | 100,0 | 76,5 | 66,7 | 100,0 |
| 35 | 7 | 2 | 1 | 15 | 87,5 | 88,2 | 77,8 | 93,8 |
| 40 | 5 | 2 | 3 | 15 | 62,5 | 88,2 | 71,4 | 83,3 |
| 45 | 0 | 2 | 8 | 15 | 0,0 | 88,2 | 0,0 | 65,2 |
| 50 | 0 | 2 | 8 | 15 | 0,0 | 88,2 | 0,0 | 65,2 |
| 55 | 0 | 0 | 8 | 17 | 0,0 | 100,0 | / | 68,0 |
Abbreviations: TP: true positive; FP: false positive; FN: false negative; TN: true negative; Se: sensitivity; Sp: specificity; PPV: positive predictive value; NPV: negative predictive value.