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  • Title: Maternal and infant characteristics associated with maternal opioid overdose in the year following delivery.
    Author: Nielsen T, Bernson D, Terplan M, Wakeman SE, Yule AM, Mehta PK, Bharel M, Diop H, Taveras EM, Wilens TE, Schiff DM.
    Journal: Addiction; 2020 Feb; 115(2):291-301. PubMed ID: 31692133.
    Abstract:
    BACKGROUND AND AIMS: Opioid-related overdose is increasingly linked to pregnancy-associated deaths, but factors associated with postpartum overdose are unknown. We aimed to estimate the strength of the association between maternal and infant characteristics and postpartum opioid-related overdose. DESIGN: Retrospective cohort study using a linked, population-level data set. SETTING: Massachusetts, United States. CONCLUSION: Among women who delivered live infants in Massachusetts, USA between 2012 and 2014, maternal diagnosis of OUD, prior non-fatal overdose, infant diagnosis of NAS and high unscheduled health-care utilization appeared to be positively associated with postpartum opioid overdose. However, more than half of postpartum overdoses in that period were to women without a diagnosis of OUD. Engagement in methadone or buprenorphine treatment in the month prior to delivery was not sufficient to reduce the odds of postpartum overdose. PARTICIPANTS: Women who delivered one or more live births from 2012 to 2014 (n = 174 517). MEASUREMENTS: The primary outcome was opioid-related overdose in the postpartum year. We used multivariable logistic regression to explore the independent associations of maternal (demographics, substance use, pregnancy) and infant [gestational age, birthweight, neonatal abstinence syndrome (NAS)] characteristics with postpartum opioid overdose. Findings were stratified by maternal opioid use disorder (OUD) diagnosis. FINDINGS: There were 189 deliveries to women who experienced ≥ 1 opioid overdose in the first year postpartum (11 of 10 000 deliveries). Among women with postpartum opioid overdose, 46.6% had an OUD diagnosis within 12 months before delivery. In our adjusted model, maternal diagnosis of OUD [adjusted odds ratio (aOR) = 3.61, 95% confidence interval (CI) = 1.73-7.51] and prior non-fatal overdose (aOR = 2.40, 95% CI = 1.11-5.17) were most strongly associated with postpartum overdose. After stratifying by OUD status, infant diagnosis of NAS (OUD+ aOR = 2.03, 95% CI = 1.26-3.27; OUD- aOR = 2.79, 95% CI = 1.12-6.93) and high unscheduled health-care utilization (OUD+ aOR = 2.27, 95% CI = 1.38-3.73; OUD- aOR = 2.11, 95% CI = 1.24-3.58) were positively associated with postpartum overdose in both groups.
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