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Retention strategies and participant retention rates among prospective longitudinal pregnancy cohorts: a systematic mapping review
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DOI：10.1016/j.annepidem.2026.110152.png)
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Abstract
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• Retention strategies and rates were gathered from articles, websites, and outreach. • The retention strategies examined were not associated with participant retention. • 25 of 130 studies retained ≥ 80% maternal participants at one year follow-up. • Participant-level factors (e.g. demographics) should be explored in future studies.
Keywords:
Pregnancy
Retention strategies
Retention rates
Maternal health
Infant health
Prospective studies
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