Table 3.
Correlation coefficients of 24-hour BP and arterial stiffness measures with age and peripheral (brachial) SBP and DBP.
| Age (years) | Peripheral SBP (mmHg) | Peripheral DBP (mmHg) | ||||
|---|---|---|---|---|---|---|
| Healthy subjects (n = 142) |
Hypertensive patients (n = 661) |
Healthy subjects (n = 142) |
Hypertensive patients (n = 661) |
Healthy subjects (n = 142) |
Hypertensive patients (n = 661) |
|
| Peripheral SBP (mmHg) | 0.02 | 0.22** | — | — | 0.56** | 0.21** |
| Peripheral DBP (mmHg) | 0.27** | −0.13** | 0.56** | 0.21** | — | — |
| Aortic SBP (mmHg) | 0.28* | 0.35** | 0.90** | 0.96** | 0.69** | 0.27** |
| Aortic DBP (mmHg) | 0.27** | −0.12** | 0.55** | 0.22* | 0.99** | 0.99** |
| RWTT (ms) | −0.25** | −0.35** | −0.08 | −0.03 | −0.11 | −0.06 |
| Normalized RWTT (ms) | −0.38** | −0.31** | 0.10 | −0.08* | 0.14 | 0.03 |
| Aortic PWV (m/s) | 0.41** | 0.26** | 0.30** | 0.02 | 0.31** | 0.12** |
| Normalized aortic PWV (m/s) | 0.44** | 0.19** | 0.04 | 0.08* | 0.03 | 0.01 |
| Peripheral AI (%) | 0.56** | 0.62** | −0.03 | 0.28** | 0.16 | −0.11** |
| Normalized peripheral AI (%) | 0.39** | 0.39** | −0.08 | 0.12** | 0.08 | −0.08 |
| Aortic AI (%) | 0.57** | 0.60** | 0.01 | 0.33** | 0.22** | −0.11** |
| Normalized aortic AI (%) | 0.41** | 0.41** | −0.05 | 0.18** | 0.13 | −0.08** |
| AASI | −0.05 | 0.36** | 0.28** | 0.53** | 0.03 | −0.19** |
SBP: systolic blood pressure; DBP: diastolic blood pressure; RWTT: reflected wave transit time; PWV: pulse wave velocity; AI: augmentation index; AASI: ambulatory arterial stiffness index.
Data are separately shown for healthy subjects and hypertensive patients. The asterisks refer to the statistical significance of the correlation coefficient (** P < 0.01; * P < 0.05).