Table 1.
Characteristics of patients by method of clinic blood pressure measurement
| Staff measured blood pressure (n=8529) | Doctor measured blood pressure (n=1593) | P for differences between groups | |
|---|---|---|---|
| Age in years | 56.4 (15.4) | 53.8 (15.9) | <0.001 |
| Age range | 18-98 | 18-94 | – |
| Body mass index | 28.9 (5.5) | 28.9 (5.5) | 0.719 |
| Female sex (%) | 4626 (54%) | 886 (56%) | – |
| Treated hypertensives (%) | 5866 (69%) | 1138 (71%) | – |
| White (%) | 7026 (82%) | 1313 (82%) | – |
| Asian (%) | 1290 (15%) | 264 (17%) | – |
| Office blood pressure (mm Hg) | |||
| Seated measurements | 5327 | 1490 | – |
| Systolic seated | 141.6 (19.0) | 150.2 (23.7) | <0.001 |
| Diastolic seated | 81.7 (12.1) | 88.8 (12.9) | <0.001 |
| Reclining measurements | 3399 | 1165 | – |
| Systolic reclining | 142.3 (21.0) | 151.8 (22.8) | <0.001 |
| Diastolic reclining | 83.8 (12.1) | 88.7 (11.9) | <0.001 |
| Ambulatory blood pressure (mm Hg) | |||
| 24 hour systolic | 132.0 (14.6) | 132.1 (14.8) | 0.867 |
| 24 hour diastolic | 76.6 (10.2) | 77.3 (10.4) | 0.013 |
| Day systolic | 135.5 (14.8) | 135.5 (15.0) | 0.938 |
| Day diastolic | 79.2 (10.6) | 80.0 (10.9) | 0.007 |
| Night systolic | 120.5 (17.0) | 120.8 (17.4) | 0.509 |
| Night diastolic | 67.8 (10.3) | 68.3 (10.9) | 0.075 |
Values presented as total, percentage of total, or mean (SD).