Table 4.
Association between history of cardiovascular disease (CVD) and systolic blood pressure (BP) during admission and over 30 days post-discharge after acute myocardial infarction (AMI), by time period of BP measurement. Results were determined using linear mixed-effects modelling, adjusting for a propensity score inclusive of CVD risk factors, number of antihypertensive medications prescribed at discharge, and the interaction between prior CVD and time.
| Time Period | n | Beta coefficient for prior CVD, mmHg (95% CI) | P-value for prior CVD | Beta coefficient for prior CVD-study day interaction, mmHg (95% CI) | P-value for interaction |
|---|---|---|---|---|---|
| Night/Early Morning (0000–0759) | 57 | 16.20 (6.41, 25.99) | <0.01 | −0.39 (−0.87, 0.08.) | 0.10 |
| Morning (0800–1159) | 40 | 7.12 (−3.78, 18.02) | 0.20 | −0.13 (−0.65, 0.39) | 0.62 |
| Noon/Afternoon (1200–1559) | 60 | 11.32 (2.63, 20.01) | 0.01 | −0.17 (−0.63, 0.30) | 0.48 |
| Late Afternoon/Evening (1600–1959) | 64 | 7.92 (−2.32, 18.15) | 0.13 | −0.40 (-0.86, 0.07) | 0.10 |
| Evening/Night (2000–2359) | 60 | 8.68 (−1.73, 19.09) | 0.10 | −0.37 (−0.79, 0.05) | 0.09 |
CVD cardiovascular disease.