Stage 1 hypertension: aRR 2.16 (95%CI, 1.31 to 3.57)
Stage 1 hypertension was associated with the highest risk of preeclampsia with severe features: aRR 2.48 (95%CI, 1.38-8.74)
Systolic and diastolic blood pressure trajectories were both significantly associated with the risk of hypertensive disorders independent of blood pressure category (p<0.001)
Initial BP normal but upward systolic trajectory compared to patients with downward trajectory
Risk of any hypertensive disorder: aRR 1.41 (95%CI 1.20-1.65)
New BP category system was significantly associated with both preeclampsia and gestational hypertension
Category 1 hypertension in the first trimester was associated with double the risk for hypertensive disorders in pregnancy
BP trajectory in early pregnancy was independently associated with risk of preeclampsia and gestational hypertension
Initial normal BP but upward systolic trajectory compared to patients with downward trajectory was associated with increased risk of 41% of any hypertensive disorder
The authors conclude that the new BP guidelines with lower thresholds may identify more women at risk for preeclampsia and gestational hypertension and that more research is needed to determine value of interventions such as low dose aspirin
Note: This study was done on data derived from nulliparous population
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