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Background
Breastfeeding in infancy is associated with a lower risk of mortality among children, but the impact on mortality in middle and late adulthood remains unknown.
Objectives
To assess the association between breastfeeding in infancy and mortality in middle and late adulthood.
Methods
We included 383,627 participants aged 40–73 from the UK Biobank (2006–2010) and followed up until 2021...