Retention and adherence
129 of 148 participants completed the second study visit (87.1% retention; 95%CI 80.6%, 91.6%) at a mean of 10.9 ± 2.1 months postpartum, with a mean participation time of 8.5 ± 2.0 months, which did not differ by study arm (p=0.8). Four (3%) participants became pregnant before study completion. Retention ranged from 76% in the HH4NM +HBPM arm to 86% in HBPM alone arm to 100% in the control arm and did not differ by self-reported race, type of hypertensive disorder, pre-pregnancy BMI or study site. No difference was seen in the mean number of blood pressures reported per month between the HBPM arm (mean 11.2± 9.9) and the HH4NM +HBPM arm (mean 10.9± 8.6; p=0.9). Participants in the HH4NM +HBPM arm had a mean of 4.9 ± 3.3 phone contacts with the lifestyle coach and 45 of 51 individuals (88%) had at least one contact with the lifestyle coach. During the study period, 44 of 51 participants (86%) accessed the study website at least once.