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Table 2 Risk of preeclampsia by changes in systolic and diastolic blood pressure from early to mid-gestation

From: Elevated diastolic blood pressure until mid-gestation is associated with preeclampsia and small-for-gestational-age birth: a population-based register study

cBP changes until mid-gestation Preeclampsia total
n % Crude OR (95% CI)d Adjustede OR (95% CI)
Systolic BPc
 Lowereda 40,285 3.4 1.0 1.0
 Elevatedb 24,200 3.6 1.1 (1.0–1.1) 1.3 (1.2–1.5)
Diastolic BPc
 Lowereda 46,473 3.2 1.0 1.0
 Elevatedb 18,009 4.2 1.3 (1.2–1.4) 1.8 (1.6–2.0)
  1. cBP: Blood pressure. The changes in systolic and diastolic BP were categorized in the following groups; a) lowered BP, defined as no change or a decrease by 1 mmHg or more, and b) elevated BP, defined as an increase by 1 mmHg or more between early to mid-gestation. dOR (95% CI): Odds ratios with 95% confidence intervals. eAdjusted for mean arterial blood pressure in early gestation, maternal body mass index, smoking, age, recurrent miscarriages before the index pregnancy and country of birth