Table 3. Diagnostic performance using the best cutoff for the evaluated pairs: PSG-AHI3% vs ODM-ODI3%, and PSG-AHI4% vs ODM-ODI4%. PSG AHI3% vs PSG AHI4% were compared using the same cutoff, as recommended by the American Academy of Sleep Medicine.
| Cutoffs | |||
|---|---|---|---|
| PSG-AHI4% ≥15 events/h | ODM-ODI3% ≥12 events/h | ODM-ODI4% ≥14 events/h | |
| Sensitivity | 74.4% | 95.1% | 92.1% |
| Specificity | 100.0% | 80.2% | 88.9% |
| Accuracy | 82.9% | 90.1% | 90.5% |
| PPV | 100.0% | 90.6% | 89.1% |
| NPV | 66.0% | 89.0% | 91.9% |
| LR+ | Infinite | 9.7 | 8.2 |
| LR- | 0.5 | 0.1 | 0.1 |
Abbreviations: PSG=polysomnography; AHI=apnea-hypopnea index; ODM=overnight digital monitoring; ODI=oxygen desaturation index; PPV=positive predictive value; NPV=negative predictive value; LR+=positive likelihood ratio; LR-=negative likelihood ratio.