Cluster 1 (n=79) | Cluster 2 (n=89) | Cluster 3 (n=67) | Cluster 4 (n=99) | Cluster 5 (n=119) | Cluster 6 (n=50) | P value* | |
Central sleep apnoea, n (%) | 71 (89.9) | 40 (44.9) | 32 (47.8) | 78 (78.8) | 112 (94.1) | 12 (24) | <0.01 |
Central AHI, /h | 26 (21–32) | 14 (8–19) | 10 (5–16) | 33 (26–41) | 42 (31–55) | 8.5 (3–13) | <0.01 |
Obstructive AHI, /h | 3 (1–6) | 20 (16–25) | 4 (1–9) | 20 (14–27) | 2 (0–5) | 40 (32–48) | <0.01 |
Time with oxygen saturation<90%, min | 32 (6–87) | 23 (3–62) | 45 (5–103) | 74 (23–141) | 31 (4–83) | 91 (38–113) | <0.01 |
CPAP usage before ASV, n (%) | 8 (10.1) | 8 (9.0) | 20 (29.9) | 14 (14.1) | 37 (31.1) | 18 (36.0) | <0.01 |
Agreed to ASV therapy, n (%) | 42 (53.2) | 68 (76.4) | 42 (62.7) | 92 (91.9) | 109 (91.6) | 50 (100) | <0.01 |
Values are median (IQR) or number of patients (%).
*Kruskal-Wallis test (quantitative variables) or χ2 test (qualitative variables).
AHI, apnoea-hypopnoea index; ASV, adaptive servo ventilation; CPAP, continuous positive airway pressure; LVEF, left ventricular ejection fraction; NYHA, New York Heart Association.