Table 3.
Prevalence and short-term reproducibility of the diagnosis of masked hypertension on ABPM among those without high office BP in the auscultatory office blood pressure sample
| A. | |||||
| Masked hypertension status | Masked awake hypertension on ABPM 2 N (%) | Overall percentage agreement (95% CI) | Kappa statistic (95% CI) | ||
| Present | Absent | ||||
| Masked awake hypertension on ABPM 1 N (%) | Present | 40 (15.7) | 21 (8.3) | 81.1 (76.3 to 86.0) | 0.50 (0.38 to 0.62) |
| Absent | 27 (10.6) | 166 (65.4) | |||
| B. | |||||
| Masked hypertension status | Masked 24-hour hypertension on ABPM 2 N (%) | Overall percentage agreement (95% CI) | Kappa statistic (95% CI) | ||
| Present | Absent | ||||
| Masked 24-hour hypertension on ABPM 1 N (%) | Present | 48 (18.9) | 22 (8.7) | 83.1 (78.4 to 87.7) | 0.57 (0.46 to 0.69) |
| Absent | 21 (8.3) | 163 (64.2) | |||
| C. | |||||
| Masked hypertension status | Masked asleep hypertension on ABPM 2 N (%) | Overall percentage agreement (95% CI) | Kappa statistic (95% CI) | ||
| Present | Absent | ||||
| Masked Asleep hypertension on ABPM 1 N (%) | Present | 63 (24.8) | 22 (8.7) | 80.7 (75.8 to 85.6) | 0.57 (0.47 to 0.68) |
| Absent | 27 (10.6) | 142 (55.9) | |||
| D. | |||||
| Masked hypertension status | Any masked hypertension on ABPM 2 N (%) | Overall percentage agreement (95% CI) | Kappa statistic (95% CI) | ||
| Present | Absent | ||||
| Any masked hypertension on ABPM 1 N (%) | Present | 84 (33.1) | 25 (9.8) | 79.1 (74.1 to 84.2) | 0.58 (0.47 to 0.68) |
| Absent | 28 (11.0) | 117 (46.1) | |||
ABPM = ambulatory blood pressure monitoring; BP = blood pressure; CI = confidence interval.
Panel A: Masked awake hypertension on ABPM. Panel B: Masked 24-hour hypertension on ABPM. Panel C: Masked asleep hypertension on ABPM. Panel D: Any masked hypertension on ABPM.
Masked awake hypertension is defined as mean awake SBP ≥ 130 mm Hg and/or mean awake DBP ≥ 80 mm Hg; masked 24-hour hypertension as mean 24-hour SBP ≥ 125 mm Hg and/or mean 24-hour DBP ≥ 75 mm Hg; masked asleep hypertension as mean asleep SBP ≥ 110 mm Hg and/or mean asleep DBP ≥ 65 mm Hg; and any masked hypertension on ABPM is defined as having masked awake hypertension, masked 24-hour hypertension, and/or masked asleep hypertension.