TABLE 2.
Equations for computation of the conventional and novel parameters described
| AHI events·h−1 |  |
| ODI events·h−1 |  |
| Obstruction duration % |  |
| Desaturation duration % |  |
| Desaturation severity % |  |
| Obstruction severity s% |  |
AHI: apnoea–hypopnoea index; ODI: oxygen desaturation index; L: number of apnoeas; K: number of hypopnoeas; TSTh: total sleep time computed in hours from polysomnography (PSG); P: number of desaturations; ApDur: duration of apnoea(s); HypDur: duration of hypopnoea(s); TST: total sleep time computed in seconds from polysomnography; DesDur: duration of desaturation(s); DesArea: area of desaturation (s%).