Abstract
Objective
We compared the association of methadone, buprenorphine, and short-acting opioid exposure with newborn head circumference (HC) and birth weight (BW), and evaluated gestational age (GA) as a mediator.
Study design
We included newborns born 2013–2018 identified by neonatal abstinence syndrome diagnosis code (N = 572) and birthday-matched unexposed controls (N = 571). Linear regressions of opioid exposure with HC and BW controlled for tobacco, marijuana, cocaine, gabapentin, cesarean section, Medicaid, and newborn sex, with mediation analysis by GA.
Result
Methadone was associated with 0.81 cm lower HC (95% CI = −1.22, −0.40) and 0.23 kg lower BW (95% CI = −0.35, −0.10) with approximately 24% and 41% mediated by GA, respectively. Buprenorphine and short acting opioids were not associated with HC or BW.
Conclusion
Methadone exposed newborns have smaller HC and lower BW not fully attributable to younger GA, suggesting a direct effect of methadone on intrauterine growth. Exploration of potential developmental consequences of this is urgently needed.
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Data availability
Due to institutional guidelines on data sharing and resource barriers, we are not making our dataset public.
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Acknowledgements
We acknowledge Kate Ahrens for her significant contribution to study design and Kaitlin Ostrander, Isabel Wolfe, Rebecca Bell and Lilly Watson for their contributions to data collection.
Funding
Funding for this study was received from the Barbara Bush Children’s Health Scholarship Academy for data abstraction.
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Authors and Affiliations
Contributions
AJC carried out all analyses of the data and did the majority of the manuscript writing. AKC, SMBG, and DFC conceptualized and designed this study, coordinated and supervised data collection, provided clinical expertise for appropriate analytical modeling, and reviewed and revised the manuscript. APP provided critical clinical expertise in the review and revision of the manuscript.
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The authors declare no competing interests.
Ethical approval
This study was approved as exempt research by the Maine Medical Center Institutional Review Board. This study was performed in accordance with the Declaration of Helsinki.
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Cutler, A.J., Cox, D.F., Gabrielson, S.M.B. et al. Association of medication-assisted treatment and short acting opioids with newborn head circumference and birth weight. J Perinatol 43, 277–282 (2023). https://doi.org/10.1038/s41372-022-01579-z
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DOI: https://doi.org/10.1038/s41372-022-01579-z
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