Second trimester mean arterial pressure (MAP-2) has been studied as a means to predict potential for development of pregnancy-induced hypertension (PIH). Parameters of predictability have been suggested, tested, and found valuable in adult populations. Although pregnant adolescents are acknowledged to be at greatest risk for PIH, standards have been neither proposed nor tested in this group.

This study was developed as follow-up to a 1985 case study analysis by Novak, Roberts, and Holm19 which compares MAP-2 values of normotensive and hypertensive adolescents. Using retrospective chart review, data were gathered from 84 nulliparous adolescents, 27 of whom developed PIH and 57 who did not. MAP-2 values proved significantly higher for the group with PIH (M = 82.2) than for those who remained normotensive (M = 71.3) (t(82) = 5.74, p = .000), supporting the research hypothesis that adolescent nulliparas who develop PIH have higher average MAP-2 values than adolescent nulliparas who remain normotensive throughout their pregnancies. Additionally, MAP values of normotensive adolescents were found to be lower than previously established standards.