Table 2. Four-class confusion matrix showing classification agreement between the evaluated pairs: A) PSG-AHI3% vs PSG-AHI4%, B) PSG-AHI3% vs ODM-ODI3% and C) PSG-AHI4% vs ODM-ODI4%.
| A) | PSG-AHI3% | |||||
| AHI<5 | 5≤AHI<15 | 15≤AHI<30 | AHI≥30 | |||
| PSG-AHI4% | AHI<5 | 31 | 45 | 5 | 0 | |
| 5≤AHI<15 | 0 | 25 | 42 | 5 | ||
| 15≤AHI<30 | 0 | 0 | 23 | 27 | ||
| AHI≥30 | 0 | 0 | 0 | 101 | ||
| B) | PSG-AHI3% | |||||
| ODM-ODI3% | AHI<5 | 5≤AHI<15 | 15≤AHI<30 | AHI≥30 | ||
| ODI<4 | 18 | 7 | 0 | 0 | ||
| 4≤ODI<12 | 13 | 43 | 7 | 3 | ||
| 12≤ODI<25 | 0 | 19 | 46 | 6 | ||
| ODI≥25 | 0 | 1 | 17 | 124 | ||
| C) | PSG-AHI4% | |||||
| OD-ODI4% | AHI<5 | 5≤AHI<15 | 15≤AHI<30 | AHI≥30 | ||
| ODI<5 | 68 | 9 | 1 | 0 | ||
| 5≤ODI<14 | 13 | 46 | 11 | 0 | ||
| 14≤ODI<26 | 0 | 16 | 31 | 9 | ||
| ODI≥26 | 0 | 1 | 7 | 92 | ||
Abbreviations: PSG=polysomnography; AHI=apnea-hypopnea index; ODM=overnight digital monitoring; ODI=oxygen desaturation index.