International migration and gestational diabetes mellitus: a systematic review of the literature and meta-analysis

Authors

  • Anita J. Gagnon,

    Corresponding author
    1. School of Nursing
    2. Department of Obstetrics and Gynaecology, McGill University
    3. McGill University Health Centre, Montreal, QC
      Dr Anita J. Gagnon, School of Nursing, McGill University, 3506 University Street, Montreal, Quebec, Canada H3A 2A7. E-mail: anita.gagnon@mcgill.ca
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  • Sarah McDermott,

    1. Innovations and Trends Analysis Division, Strategic Initiatives and Innovations Directorate, Public Health Agency of Canada
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  • Juliana Rigol-Chachamovich,

    1. School of Nursing
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  • Mridula Bandyopadhyay,

    1. Mother and Child Health Research, Faculty of Health Sciences, La Trobe University, Melbourne, Vic., Australia
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  • Babill Stray-Pedersen,

    1. Division of Women and Children, Oslo University Hospital, Rikshospitalet and Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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  • Donna Stewart,

    1. University Health Network Women's Health Program, University of Toronto, Toronto, ON, Canada
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  • for the ROAM Collaboration


Dr Anita J. Gagnon, School of Nursing, McGill University, 3506 University Street, Montreal, Quebec, Canada H3A 2A7. E-mail: anita.gagnon@mcgill.ca

Summary

Gagnon AJ, McDermott S, Rigol-Chachamovich J, Bandyopadhyay M, Stray-Pedersen B, Stewart D, for the ROAM Collaboration. International migration and gestational diabetes mellitus: a systematic review of the literature and meta-analysis. Paediatric and Perinatal Epidemiology 2011; 25: 575–592.

Influxes of migrant women of childbearing age to receiving countries have made their perinatal health status a key priority for many governments. The international research collaboration Reproductive Outcomes And Migration (ROAM) reviewed published studies to assess whether migrants in countries of resettlement have a greater risk of gestational diabetes mellitus (GDM) than women in receiving countries. A systematic review of the literature from Medline, Embase, PsychInfo and CINAHL from 1990 to 2009 included studies of migrant women and GDM. Studies were excluded if there was no cross-border movement or comparison group or if the receiving country was not the country of resettlement. Studies were assessed for quality, analysed descriptively and meta-analysed. Twenty-four reports (representing >120 000 migrants) met our inclusion criteria. Migrants were described primarily by geographic origin; other relevant aspects (e.g. time in country, language fluency) were rarely studied. Migrants' results for GDM were worse than those for receiving-country women in 79% of all studies. Meta-analyses showed that, compared with receiving-country women, Caribbean, African, European and Northern European women were at greater risk of GDM, while North Africans and North Americans had risks similar to receiving-country women. Although results of the 31 comparisons of Asians, East Africans or non-Australian Oceanians were too heterogeneous to provide a single GDM risk estimate for migrant women, only one comparison was below the receiving-country comparison group, all others presented a higher risk estimate. The majority of women migrants to resettlement countries are at greater risk for GDM than women resident in receiving countries. Research using clear, specific migrant definitions, adjusting for relevant risk factors and including other aspects of migration experiences is needed to confirm and understand these findings.

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