Table 4.
Distribution of measurements relative to constant blood pressure of 140/90 mmHg and their relations with mean second and third blood pressure readings
| Readings | SBP <140 mmHg, n (%) | SBP ≥140 mmHg, n (%) | P* |
|---|---|---|---|
| SBP | |||
| BP2,3 | 2041 (90.2) | 223 (9.8) | - |
| BP1 | 1928 (85.2) | 336 (14.8) | <0.001 |
| BP2 | 2010 (88.8) | 254 (11.2) | 0.1 |
| BP1,2 | 1987 (87.8) | 277 (12.2) | 0.01 |
| BP1,2,3 | 2017 (89.1) | 247 (10.9) | 0.2 |
| Readings | DBP <90 mmHg, n (%) | DBP ≥90 mmHg, n (%) | P |
| DBP | |||
| BP2,3 | 2137 (94.4) | 127 (5.6) | - |
| BP1 | 2079 (91.8) | 185 (8.2) | 0.001 |
| BP2 | 2118 (93.6) | 146 (6.4) | 0.2 |
| BP1,2 | 2111 (93.2) | 153 (6.8) | 0.1 |
| BP1,2,3 | 2125 (93.9) | 139 (6.1) | 0.4 |
*P value resulted from Chi-square test. SBP=Systolic blood pressure; DBP=Diastolic blood pressure; BP1=First time blood pressure reading; BP2=Second time blood pressure reading; BP1,2=Mean first and second blood pressure readings; BP2,3=Mean second and third blood pressure readings; BP1,2,3=Mean first, second, and third blood pressure readings; BP=Blood pressure