Participation in the CenteringPregnancy Program and Pregnancy-Induced Hypertension

CenteringPregnancy emphasizes nutrition, learning, and peer support through a group meeting format in contrast to the standard of prenatal care that maximizes a pregnant patient's time with their provider. It was hypothesized that the program may yield a reduced risk of pregnancy-induced hypertension. In this observational study, authors examined the impacts of the CenteringPregnancy program versus those of standard of prenatal care on pregnancy-induced hypertension.

In 2021, birth certificate data were linked to hospital discharge records of women who delivered in obstetric clinics in the Midlands of South Carolina between 2015 and 2019. Logistic regression models were used to estimate the association between CenteringPregnancy participation (n=547) and any pregnancy-induced hypertension and specific pregnancy-induced hypertension diagnoses (gestational hypertension/unspecified hypertension, mild pre-eclampsia, and severe pre-eclampsia/eclampsia). Propensity score techniques (e.g., inverse probability of treatment weighting) were used to adjust for self-selection into the program versus into standard of prenatal care.

CenteringPregnancy participants had higher odds of developing any pregnancy-induced hypertension under all specifications (OR=1.48, 95% CI=1.15, 1.92) and specifically gestational hypertension/unspecified hypertension (OR=1.76, 95% CI=1.28, 2.42) than those in standard of prenatal care. However, CenteringPregnancy participants did not experience significantly higher odds of mild pre-eclampsia (OR=1.06, 95% CI=0.65, 1.78) and severe pre-eclampsia/eclampsia (OR=1.21, 95% CI=0.78, 1.89) compared with standard of prenatal care participants.

Participation in CenteringPregnancy was associated with higher odds of pregnancy-induced hypertension, particularly gestational hypertension, than participation in standard of prenatal care. Additional research is warranted to definitely rule out selection bias and identify contributing factor(s) that increased pregnancy-induced hypertension despite efforts to improve pregnancy-related health outcomes among CenteringPregnancy participants.