Characteristics of sleep apnoea in patients*
| Variable | n (%) | 95% CI |
| AHI ≥5 | n=120 | |
| AHI ≥15 | 65 (54.2) | 45.3 to 62.8 |
| AHI ≥30 | 37 (30.8) | 23.3 to 39.6 |
| CAI ≥5 | 33 (27.5) | 20.3 to 36.1 |
| CAI ≥15 | 18 (15) | 9.7 to 22.5 |
| CAI ≥30 | 12 (10) | 5.8 to 16.7 |
| Obstructive sleep apnoea | 86 (72) | 63 to 79 |
| Central sleep apnoea | 24 (20) | 13.8 to 28 |
| Sleep apnoea: indeterminate type | 10 (8) | 4.6 to 14.7 |
*All variables are expressed as events per hour. Participants were stratified to have obstructive sleep apnoea if greater than or equal to 50% of events were obstructive in nature, and were stratified to have central sleep apnoea if greater than or equal to 50% of events were central in nature.15 Participants were stratified to have indeterminate sleep apnoea if they have AHI >5, but both the OAHI and CAHI were <5.
AHI, Apnoea-Hypopnoea Index; CAI, Central Apnoea Index.