Aim: To evaluate postpartum blood pressure (BP) and renal function across the following subtypes of hypertensive disorders of pregnancy (HDP): gestational hypertension (GH), preeclampsia (PE) or superimposed preeclampsia (SPE), and chronic hypertension (CH). Methods: Dara from two studies in the Japan Birth Cohort Consortium were used: Tohoku Medical Megabank Project Birth and Three-Generation (TMM BirThree) Cohort Study and the Babies and their parents' longitudinal Observation in Suzuki memorial Hospital in Intrauterine period (BOSHI) study. The TMM BirThree Cohort Study measured casual BP in 2,948 women and blood urea nitrogen (BUN) and creatinine (Cr) levels in 2,937 women (7.1 +/- 1.0 years postpartum). The BOSHI study assessed home BP values obtained from 280 women and BUN and Cr levels measured in 221 women (8.0 +/- 0.7 years). BP, BUN, and Cr values were analyzed using analysis of covariance. Results: Women with CH exhibited higher casual and home systolic and diastolic BP values than women with normotension, GH, and PE/SPE. In both cohorts, women with PE/SPE maintained higher BUN and Cr levels than those with normotension, GH, or CH. Conclusions: Overall, pregnant women with CH exhibited higher casual and home BP values than those with other HDP subtypes, while those with PE/SPE showed elevated BUN and Cr levels.
