OBJECTIVE
This study aims to evaluate perceived lifetime stress (LS), perceived stress during pregnancy (PS), chronic hypertension (CH) and their joint association with preeclampsia risk.
STUDY DESIGN
This study includes 4,314 women who delivered a singleton live birth at the Boston Medical Center from October 1998 through February 2008. CH is defined as hypertension diagnosed before pregnancy. Information regarding LS and SP was collected by questionnaire. Preeclampsia was diagnosed by clinical criteria.
RESULTS
LS, SP and CH were each associated with an increased risk of preeclampsia (OR(95%CI)=2.1(1.6–2.8) for LS; 1.7(1.3–2.1) for SP; 11.1(8.1–15.4) for CH). Compared with normotensive pregnancy with low LS, both normotensive pregnancy with high LS (2.1(1.5–2.9)) and pregnancy with CH and low LS (10.6(7.5–15.1)) showed an increased risk of preeclampsia, while pregnancy with high LS and CH yielded the highest risk of preeclampsia (21.3(10.3–44.3)). The joint association of SP and CH on preeclampsia was very similar to that of the joint association of LS and CH.
CONCLUSIONS
This finding indicates that high psychosocial stress and CH can act in combination to increase the risk of preeclampsia up to 20-fold. This finding underscores the importance of efforts to prevent, screen and manage CH, along with reducing psychosocial stress, particularly among women with CH.