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Lancet Psychiatry. 2018 Aug;5(8):644-652. doi: 10.1016/S2215-0366(18)30180-9. Epub 2018 Jun 18.

Maternal and infant outcomes associated with lithium use in pregnancy: an international collaborative meta-analysis of six cohort studies.

Author information

1
The National Center for Register-based Research, Department of Economics and Business Economics, Aarhus University, Aarhus, Denmark; Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark. Electronic address: tmo@econ.au.dk.
2
The National Center for Register-based Research, Department of Economics and Business Economics, Aarhus University, Aarhus, Denmark.
3
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
4
Interdisciplinary Centre for Health and Society, Scarborough Campus, University of Toronto, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Institute for Clinical Evaluative Sciences, Toronto, ON, Canada.
5
Division of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff, UK; Department of Psychiatry, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA.
6
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN, USA.
7
Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada; Institute for Clinical Evaluative Sciences, Toronto, ON, Canada.
8
Section of Women's Mental Health/Women's Health Academic Centre, Department of Health Service and Population Research, King's College London, London, UK; Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
9
Department of Psychiatry, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA.
10
Department of Obstetrics, Section of Perinatal Psychiatry, Leiden University Medical Center, Leiden, Netherlands.
11
Department of Psychiatry, Erasmus Medical Centre, Rotterdam, Netherlands.
12
Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada; Institute for Clinical Evaluative Sciences, Toronto, ON, Canada.
13
Department of Psychiatry, Erasmus Medical Centre, Rotterdam, Netherlands; Department of Psychiatry and Department of Obstetrics, Gynecology and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York City, NY, USA.

Abstract

BACKGROUND:

Concerns about teratogenicity and maternal and offspring complications restrict the use of lithium during pregnancy for the treatment of mood disorders. We aimed to investigate the association between in-utero lithium exposure and risk of pregnancy complications, delivery outcomes, neonatal morbidity, and congenital malformations.

METHODS:

In this meta-analysis, primary data from pregnant women and their children from six international cohorts based in the community (Denmark, Sweden, and Ontario, Canada) and in clinics (the Netherlands, UK, and USA) were analysed. Pregnancies were eligible for analysis if the pregnancy resulted in a liveborn singleton between 1997 and 2015, if health-related information was available for both mother and infant, and if the mother had a mood disorder (bipolar disorder or major depressive disorder) or if she had been given lithium during pregnancy (at least two dispensations of lithium during pregnancy that were dispensed any time from 1 month before conception until the delivery, or a single lithium dispensation during pregnancy when there was at least one other lithium dispensation within 6 months before or after this date). Pregnancies during which the mother had been prescribed known teratogenic drugs were excluded. Pregnancies were grouped into a lithium-exposed group and a mood disorder reference group. The main outcome measures were pregnancy complications, delivery outcomes, neonatal readmission to hospital within 28 days of birth, and congenital malformations (major malformations and major cardiac malformations). Analyses were done at each site by use of a shared protocol. Adjusted odds ratios (aORs) and 95% CIs were calculated by use of logistic regression models, and site-specific prevalence rates and ORs were pooled by use of random-effects meta-analytical models.

FINDINGS:

22   124 eligible pregnancies were identified across the six cohorts, of which 727 pregnancies were eligible for inclusion in the lithium-exposed group (557 [77%] from register-based cohorts and 170 [23%] from clinical cohorts). Lithium exposure was not associated with any of the predefined pregnancy complications or delivery outcomes. An increased risk for neonatal readmission within 28 days of birth was seen in the lithium-exposed group compared with the reference group (pooled prevalence 27·5% [95% CI 15·8-39·1] vs 14·3% [10·4-18·2]; pooled aOR 1·62, 95% CI 1·12-2·33). Lithium exposure during the first trimester was associated with an increased risk of major malformations (pooled prevalence 7·4% [95% CI 4·0-10·7] vs 4·3% [3·7-4·8]; pooled aOR 1·71, 95% CI 1·07-2·72) but for major cardiac malformations the difference was not significant (2·1% [0·5-3·7] vs 1·6% [1·0-2·1]; pooled aOR 1·54, 95% CI 0·64-3·70).

INTERPRETATION:

Considering both the effect sizes and the precision of the estimates in this meta-analysis, treatment decisions for pregnant women with mood disorders must weigh the potential for increased risks of lithium during pregnancy-in particular those associated with use of lithium during the first trimester-against its effectiveness at reducing relapse.

FUNDING:

None.

PMID:
29929874
PMCID:
PMC6077091
[Available on 2019-08-01]
DOI:
10.1016/S2215-0366(18)30180-9

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