TABLE 3.
Sensitivities and specificities of automated and manually scored PSS-AL AHI compared with PSG AHI
| PSS-AL AHI |
PSG SDB (AHI ≥ 1.5 events/h)
|
PSG SDB (AHI ≥5 events/h)
|
||||||
|---|---|---|---|---|---|---|---|---|
| Sensitivity | Specificity | PPV | NPV | Sensitivity | Specificity | PPV | NPV | |
| Manual PSS-AL (cut-off ≥ 1.5 events/h) | 94 | 16 | 51 | 75 | 100 | 13 | 16 | 100 |
| Manual PSS-AL (cut-off ≥ 5 events/h) | 94 | 61 | 70 | 92 | 100 | 40 | 22 | 100 |
| Automated PSS-AL (cut-off ≥ 1.5 events/h) | 94 | 0 | 47 | 0 | 100 | 3 | 15 | 100 |
| Automated PSS-AL (cut-off ≥ 5 events/h) | 94 | 44 | 62 | 88 | 100 | 30 | 19 | 100 |
Data presented as %. AHI Apnea-hypopnea index; NPV Negative predictive value; PSG Polysomnography; PSS-AL Portable sleep study-ApneaLink (ResMed, USA); PPV Positive predictive value; SDB Sleep disordered breathing