Research
Obstetrics
A national study of the complications of lupus in pregnancy

These data were presented as an abstract at the 70th Annual Scientific Meeting of the American College of Rheumatology, Washington, DC, Nov. 10-14, 2006.
https://doi.org/10.1016/j.ajog.2008.03.012Get rights and content

Objective

This study was undertaken to determine the risk of rare complications during pregnancy for women with systemic lupus erythematosus.

Study Design

By using the Nationwide Inpatient Sample from 2000-2003, we compared maternal and pregnancy complications for all pregnancy-related admissions for women with and without systemic lupus erythematosus.

Results

Of more than 16.7 million admissions for childbirth over the 4 years, 13,555 were to women with systemic lupus erythematosus. Maternal mortality was 20-fold higher among women with systemic lupus erythematosus. The risks for thrombosis, infection, thrombocytopenia, and transfusion were each 3- to 7-fold higher for women with systemic lupus erythematosus. Lupus patients also had a higher risk for cesarean sections (odds ratio: 1.7), preterm labor (odds ratio: 2.4), and preeclampsia (odds ratio: 3.0) than other women. Women with systemic lupus erythematosus were more likely to have other medical conditions, including diabetes, hypertension, and thrombophilia, that are associated with adverse pregnancy outcomes.

Conclusion

Women with systemic lupus erythematosus are at increased risk for serious medical and pregnancy complications during pregnancy.

Section snippets

Materials and Methods

The research protocol used in this study was reviewed and approved by the Duke University Medical Center Institutional Review Board. The NIS, from the Healthcare Cost and Utilization Project (HCUP) of the Agency for Healthcare Research and Quality (AHRQ), was queried for all pregnancy-related discharge codes for the years 2000-2003. The NIS contains data from approximately 1000 hospitals and is the largest all-payer inpatient care database in the United States. It is a 20% stratified sample

Results

There were more than 16.7 million deliveries between 2000 and 2003: 13,555 of which were to women with a diagnosis of SLE. These pregnancies resulted in 18.3 million pregnancy-related hospitalizations: 17,263 of which were to women with a diagnosis of SLE.

The demographic make-up of the SLE pregnancies was different from the non-SLE pregnant population (Table 1). Women with SLE were, on average, older than women without SLE. A larger proportion of SLE pregnancies were to African American women,

Comment

When compared with other women, SLE patients are at increased risk for maternal death, preeclampsia, preterm labor, thrombosis, infection, and hematologic complications during pregnancy. These elevated risks make clear the need for close monitoring by both maternal-fetal medicine physicians and rheumatologists during pregnancy.

Women with SLE in the NIS cohort had several demographic and medical risk factors for adverse pregnancy outcomes, beyond the diagnosis of SLE. Women with SLE were older

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    Cite this article as: Clowse MEB, Jamison M, Myers E, et al. A national study of the complications of lupus in pregnancy. Am J Obstet Gynecol 2008;199:127.e1-127.e6.

    Drs Clowse and James are funded by NIH grant 5K12-HD-043446

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