Table 5 Systolic blood pressure variability among groups categorized by systolic blood pressure difference
Systolic blood pressure difference between office and daytime ambulatory blood pressure | ||||||
|---|---|---|---|---|---|---|
Masked effect | Reference | White-coat effect | ||||
> -5 mmHg | -5 to < 0 mmHg | 0 to < 5 mmHg | 5 to < 10 mmHg | ≥ 10 mmHg | p* | |
All, n | 70 | 52 | 50 | 53 | 71 | |
SD of 24-h SBP, mmHg | 17.5 ± 5.0a | 14.7 ± 3.2 | 13.9 ± 3.6 | 13.9 ± 3.7 | 13.5 ± 4.0 | < 0.001 |
SD of daytime SBP, mmHg | 14.3 ± 5.0 | 12.7 ± 3.8 | 12.5 ± 4.7 | 12.8 ± 4.1 | 12.9 ± 4.9 | 0.396 |
SD of nighttime SBP, mmHg | 11.8 ± 4.4 | 11.3 ± 3.9 | 10.9 ± 4.4 | 11.0 ± 4.1 | 10.3 ± 4.3 | 0.875 |
cv of 24-h SBP, % | 12.4 ± 3.3a | 10.8 ± 2.3 | 10.5 ± 2.9 | 10.7 ± 2.9 | 10.8 ± 3.0 | 0.001 |
cv of daytime SBP, % | 9.5 ± 3.0 | 9.0 ± 2.6 | 9.2 ± 3.5 | 9.5 ± 2.9 | 10.1 ± 3.6 | 0.438 |
cv of nighttime SBP, % | 9.2 ± 3.3 | 8.8 ± 2.7 | 8.8 ± 3.7 | 8.8 ± 3.1 | 8.6 ± 3.3 | 0.828 |
ARV of 24-h SBP, mmHg | 12.4 ± 4.4 | 11.0 ± 2.8 | 10.4 ± 2.9 | 11.3 ± 3.5 | 10.8 ± 3.5 | 0.386 |
Ambulatory daytime hypertension, n | 68 | 47 | 43 | 43 | 38 | |
SD of 24-h SBP, mmHg | 17.6 ± 5.1a | 14.7 ± 3.3 | 13.9 ± 3.8 | 13.7 ± 3.9 | 14.2 ± 3.8 | 0.001 |
SD of daytime SBP, mmHg | 14.3 ± 5.1 | 12.8 ± 3.9 | 12.7 ± 4.7 | 12.4 ± 4.3 | 13.3 ± 4.8 | 0.277 |
SD of nighttime SBP, mmHg | 11.8 ± 4.5 | 11.4 ± 3.9 | 10.7 ± 4.4 | 10.9 ± 4.3 | 10.6 ± 4.1 | 0.894 |
cv of 24-h SBP, % | 12.3 ± 3.4b | 10.6 ± 2.3 | 10.4 ± 3.0 | 10.4 ± 2.9 | 10.9 ± 2.8 | 0.001 |
cv of daytime SBP, % | 9.5 ± 3.0 | 8.9 ± 2.6 | 9.2 ± 3.4 | 9.1 ± 3.0 | 9.9 ± 3.3 | 0.280 |
cv of nighttime SBP, % | 9.1 ± 3.3 | 8.8 ± 2.8 | 8.5 ± 3.6 | 8.7 ± 3.2 | 8.6 ± 2.8 | 0.882 |
ARV of 24-h SBP, mmHg | 12.5 ± 4.4 | 11.1 ± 2.8 | 10.3 ± 2.9 | 11.0 ± 3.7 | 11.2 ± 3.6 | 0.345 |