Table 3 Sleep characteristics in heart failure patients with and without sleep apnoea
Total (N = 103) | With SA (N = 75) | Without SA (N = 28) | p value | |
|---|---|---|---|---|
AHI (n/h) | 10.4 (4.6-30.5) | 17.6 (9.3-42.5) | 1.9 (0.6-4.1) | < 0.001 |
Total sleep time (TST, min) | 246.0 (189.5-333.0) | 246.2 (189.5-334.0) | 222.0 (131.5-301.5) | 0.34 |
Sleep (% TST) | ||||
Stage 1 | 15.5 (10.0-23.4) | 17.5 (12.7-27.4) | 11.6 (5.4-15.3) | < 0.001 |
Stage 2 | 60.4 (49.8-71.2) | 60.4 (50.3-72.0) | 60.9 (46.6-70.4) | 0.58 |
Stages 3 and 4 | 10.9 (1.0-20.3) | 6.9 (0.3-15.1) | 19.3 (13.4-31.5) | < 0.001 |
REM | 8.0 (3.1-12.7) | 8.4 (3.8-13.1) | 6.4 (0.0-10.9) | 0.17 |
NREM | 92.1 (87.4-97.2) | 91.6 (87.1-96.4) | 93.6 (89.100.0) | 0.22 |
Arousals (n/h) | 6.1 (3.1-10.4) | 7.2 (4.0-11.0) | 3.8 (1.0-7.3) | 0.02 |
Mean SO2 (%) | 93.0 (91.0-95.0) | 93.0 (90.0-94.0) | 94.0 (92.0-96.0) | 0.02 |
Lowest SO2 (%) | 81.0 (76.0-85.0) | 81.0 (71.2-85.0) | 85.0 (79.0-88.0) | 0.006 |
SO2 < 90% (% TST) | 7.7 (2.0-27.6) | 15.6 (3.7-39.8) | 2.0 (0.2-6.2) | < 0.001 |