Immigrant Ancestry and Birthweight across Generations: The Case of Sweden
Siddartha Aradhya, Lund University
Methods: Children born in Sweden during the period 1987-2011 (G3) are linked to their mothers (G2), born in Sweden during the period 1973-1995, and their maternal grandmothers (G1) who are native or foreign-born. First, immigrant-native birthweight differences are examined for both G2 and G3 by country of ancestry. Second, G3 immigrant-native birthweight differences are examined by country of ancestry while accounting for factors that theoretically explain the differential. All analyses are conducted using linear regression.
Results: The results show that particular immigrant populations experience increasing birthweight disparities relative to natives over generations, while others display a convergence or no change. These differences only partially attenuate in the fully adjusted models.
Conclusion: The populations that display an increasing disparity over time are those from less developed origins that have traditionally struggled to integrate into Swedish society. It is not possible to identify the specific mechanisms behind birthweight changes over generations in the current study; however, some potential explanations include epigenetic processes or stresses related to social isolation.
Presented in Session 35: Migration and Health