Conventional and 24-hour ambulatory blood pressure in the prediction of atrial fibrillation in 2776 participants with complete 24-hour ambulatory blood pressure monitoring
| Blood pressure component | Conventional blood pressure | Ambulatory blood pressure | ||||||
| 24-hour blood pressure | Daytime blood pressure | Night-time blood pressure | ||||||
| HRs (95% CI) | P value | HRs (95% CI) | P value | HRs (95% CI) | P value | HRs (95% CI) | P value | |
| Systolic | ||||||||
| Mean±SD, mm Hg | 125.8±17.1 | 119.3±11.4 | 125.6±12.1 | 108.7±12.3 | ||||
| Adjusted | 1.19 (0.99 to 1.43) | 0.060 | 1.27 (1.07 to 1.51) | 0.0056 | 1.22 (1.02 to 1.46) | 0.023 | 1.20 (1.02 to 1.42) | 0.029 |
| Diastolic | ||||||||
| Mean±SD, mm Hg | 77.9±10.9 | 72.1±7.7 | 77.8±8.3 | 62.6±8.6 | ||||
| Adjusted | 1.10 (0.90 to 1.34) | 0.36 | 1.14 (1.03 to 1.48) | 0.024 | 1.16 (0.96 to 1.40) | 0.13 | 1.19 (1.01 to 1.42) | 0.043 |
| Pulse pressure | ||||||||
| Mean±SD, mm Hg | 48.0±12.2 | 47.2±7.5 | 47.8±8.0 | 46.1±7.8 | ||||
| Adjusted | 1.17 (1.00 to 1.38) | 0.050 | 1.18 (0.99 to 1.40) | 0.060 | 1.16 (0.98 to 1.37) | 0.073 | 1.12 (0.94 to 1.34) | 0.19 |
HRs (95% CI) are for the risk associated with 1 SD increases in systolic, diastolic and mean blood pressure. All HRs were computed by Cox regression including cohort as a random effect and adjusted for sex, age, body mass index, serum cholesterol, tobacco and alcohol use, history of cardiovascular disease and diabetes mellitus and antihypertensive drug treatment.