Recruitment
Pregnant women visiting the outpatient clinic of the Radboudumc in Nijmegen, the Netherlands, were eligible for inclusion. For both parts of this study patients were separately included. All women lived in Nijmegen and surroundings, were over the age of eighteen, provided written informed consent, had all of their regular pregnancy check-ups to the Radboudumc and had a blood pressure of 80-190 mmHg systolic and 30-140 mmHg diastolic. Women with diagnosed arrhythmia, edema in the arms or unable to give their written informed consent in Dutch were excluded.
Phase 1
For this phase we included women with a gestational age over 30 weeks, as this period of pregnancy is accompanied by the largest variability in blood pressure and most hypertensive disorders occur in this period. We aimed for an inclusion of at least 30 women in line with the ESH-IP 2010 protocol.
Phase 2
In this phase we included women of all gestation ages to evaluate home versus office blood pressure measurements from the first to third trimester. We aimed for an inclusion of at least 30 women as well.