Table 3.
Sensitivity analysis of difference between health-exam blood pressure (BP) and research-quality BP
| Mean SBP, mm Hg | Mean difference (95% CI) | Mean DBP, mm Hg | Mean difference (95% CI) | |||
|---|---|---|---|---|---|---|
| Health-exam | Research-quality | Health-exam | Research-quality | |||
| Excluding zero end digit BP records | 140.9 | 137.0 | 3.9 (3.4, 4.3) | 90.0 | 87.1 | 2.8 (2.5, 3.1) |
| At least one matched BPs with time interval less than 180 days | 140.7 | 135.4 | 5.3 (5.0, 5.5) | 89.9 | 86.5 | 3.4 (3.2, 3.6) |
| At least two matched BPs with time interval less than 180 days | 140.7 | 135.4 | 5.4 (5.1, 5.7) | 90.0 | 86.5 | 3.5 (3.3, 3.7) |
| At least one matched BPs with time interval less than 90 days | 139.8 | 135.4 | 4.4 (4.1, 4.7) | 89.7 | 86.6 | 3.0 (2.8, 3.2) |
| At least one matched BPs with time interval less than 30 days | 139.9 | 135.1 | 4.8 (4.5, 5.1) | 89.6 | 86.5 | 3.1 (2.9, 3.3) |
| At least two matched BPs with time interval less than 30 days | 139.9 | 135.3 | 4.7 (4.3, 5.0) | 89.9 | 86.5 | 3.4 (3.2, 3.7) |
| At least one matched BPs with time interval less than seven days | 139.9 | 135.0 | 4.9 (4.6, 5.3) | 89.6 | 86.5 | 3.2 (2.9, 3.4) |
| At least two matched BPs with time interval less than seven days | 139.7 | 134.6 | 5.1 (4.6, 5.5) | 89.7 | 86.1 | 3.6 (3.3, 3.9) |
| At least one matched BPs on the same day | 139.0 | 134.2 | 4.8 (4.0, 5.5) | 89.0 | 86.0 | 2.9 (2.4, 3.4) |
| At least two matched BPs on the same day | 139.5 | 134.0 | 5.5 (3.7, 7.2) | 88.9 | 85.8 | 3.1 (1.9, 4.3) |
| Comparing health-exam BPs with mean value of research-quality BPs with time interval less than 90 days | 139.9 | 135.6 | 4.3 (4.0, 4.6) | 90.1 | 86.7 | 3.3 (3.1, 3.5) |
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