Table 3.
Ambulatory blood pressure variability according to oxygen desaturation index
| Ambulatory recording | Model | Oxygen desaturation index | P (for trend) | |||
|---|---|---|---|---|---|---|
| 0‐4 (n = 1473) | 5‐14 (n = 645) | 15‐29 (n = 165) | ≥30 (n = 59) | |||
| 24‐h systolic | SD | 14.4 ± 3.7 | 14.7 ± 3.7 | 14.9 ± 3.9 | 13.8 ± 4.0 | .35 |
| CV | 11.5 ± 2.9 | 11.6 ± 3.0 | 11.5 ± 3.1 | 10.3 ± 3.0 | .31 | |
| 24‐h diastolic | SD | 10.1 ± 2.3 | 10.2 ± 2.3 | 10.2 ± 2.4 | 9.8 ± 2.5 | .80 |
| CV | 12.6 ± 3.0 | 12.6 ± 2.9 | 12.3 ± 3.0 | 11.3 ± 3.0 | .02 | |
| Daytime systolic | SD | 11.4 ± 3.5 | 11.8 ± 3.7 | 11.9 ± 3.5 | 11.4 ± 4.0 | .04 |
| CV | 8.6 ± 2.7 | 9.0 ± 3.0a | 8.8 ± 2.7 | 8.3 ± 3.1 | .31 | |
| Daytime diastolic | SD | 7.6 ± 2.2 | 7.8 ± 2.2 | 7.7 ± 2.1 | 7.8 ± 2.3 | .13 |
| CV | 9.0 ± 2.8 | 9.3 ± 2.9a | 8.9 ± 2.7 | 8.8 ± 2.8 | .76 | |
| Nighttime systolic | SD | 8.9 ± 3.3 | 9.5 ± 3.7 | 10.0 ± 3.5a | 10.4 ± 4.6a | <.0001 |
| CV | 7.9 ± 2.8 | 8.3 ± 3.0a | 8.5 ± 2.8a | 8.2 ± 3.6 | .001 | |
| Nighttime diastolic | SD | 6.9 ± 2.4 | 7.4 ± 2.5a | 7.8 ± 2.8a | 8.2 ± 3.3a | <.0001 |
| CV | 9.7 ± 3.4 | 10.2 ± 3.6a | 10.4 ± 3.8a | 10.2 ± 4.2 | .002 | |
Data are mean ± standard deviation. SD indicates standard deviation; CV, coefficient of variation.
a
P value < .05 compared with oxygen desaturation index of 0‐4 events/h group.