Maternal Rh D status, anti-D immune globulin exposure during pregnancy, and risk of autism spectrum disorders
Lisa A Croen1, Marilyn Matevia, Cathleen K Yoshida
1Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA. lisa.a.croen@kp.org
Objective:
The objective of the study was to investigate the association between maternal Rh D status, prenatal exposure to anti-D immune globulin, and the risk of autism in the offspring.
Study Design:
Case-control study among children born from 1995 to 1999 at Kaiser Permanente Northern California hospitals. Cases (n = 400) were children with an autism diagnosis; controls (n = 410) were children without autism, randomly sampled and frequency matched to cases on sex, birth year, and birth hospital. Maternal Rh D status and anti-D immune globulin exposure were ascertained from prenatal medical records.
Results:
No case-control differences were observed for maternal Rh negative status (11.5% vs 10.0%, P = .5) or prenatal anti-D immune globulin exposure (10.0% vs. 9.3%, P = .7). Risk of autism remained unassociated with maternal Rh status or prenatal exposure to anti-D immune globulins after adjustment for covariates.
Conclusion:
These data support previous findings that prenatal exposure to thimerosal-containing anti-D immune globulins does not increase the risk of autism.
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