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Migrants suffer from worse psychological health than natives in many countries, yet the extent to which this varies by age at migration and duration of residence in the receiving context remains unexplored in Sweden. Drawing on a life course approach, we investigate differences in psychological distress by age at migration and duration of residence in working-age migrants to Sweden, and examine the role of various social determinants of health in explaining these differences relative to Swedish-born. Using pooled cross-sectional data from the 2011/2015 Health on Equal Terms survey in Västra Götaland Region, Sweden (n = 58,428), we applied logistic regression analysis to calculate predicted probabilities and average marginal effects (AME) of migrant status, by age at migration and duration of residence, on psychological distress. Analyses were stratified by sex and region of origin and controlled for indicators of socioeconomic status (SES), social cohesion, and discrimination to assess their potential contribution to differences in migrants' and natives' psychological distress. All migrants except men from OECD-predominant regions had a greater probability of psychological distress than Swedish-born (ranging from AME 0.031 [95% Confidence Interval or CI 0.000-0.062] for OECD women to AME 0.115 [95% CI 0.074-0.156] for non-OECD men). Marginal effects of migration status on psychological distress probabilities generally increased with age at migration and duration of residence. Differences between migrants and natives were largely attenuated after controlling for social determinants, the greatest contribution coming from inequalities in social cohesion, followed by inequalities in discrimination and SES. Our results suggest a relative health advantage of early-life compared to later-life migration, albeit with worse outcomes with longer residence in Sweden. The predominance of integration opportunities in childhood strengthens calls for supportive policies to assist older migrants' integration directly upon arrival, which may ultimately improve their psychological wellbeing., (Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.)

In this study we assessed the effect duration of residence on the association between maternal origin and birthweight in Sweden. Considering sibling information, we also investigated how far the presence or lack of such an effect could be biased by the use of cross-sectional data, since there may be a selection among those mothers who decide to have a child soon after moving to the country (e.g. those with a more stable family situation). Using the Swedish Medical Birth Register for the period 1992-2012, we performed linear and multinomial regressions, multilevel linear regressions, and random effect meta-analysis. Offspring of foreign-born mothers were lighter on average (-120 g [-143,-60]) and had a higher risk of having low birthweight (RRR:1.70 [1.61,1.80]) compared to those with Swedish-born mothers. The variation of birthweight by duration of residence was small (less than 50 g) compared to the gradient found between countries grouped according to the human development index (HDI), where the difference between countries with low and very high HDI was of 105 g. Moreover, no clear pattern toward a convergence with the Swedish population was observed after nine years in the country, which was confirmed when we compared the between- and within-mother analyses by HDI categories. Overall, our results support the thesis that contextual early life conditions have an impact on adult health (reproductive health in this case) with consequences in the next generation that cannot be buffered by the situation experienced in the host country., (Copyright © 2017 Elsevier Ltd. All rights reserved.)