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This paper critically explores how survey and routinely collected data could aid in assessing the generalisability of public health evidence. We propose developing approaches that could be employed in understanding the relevance of public health evidence, and investigate ways of producing meta‐analytic estimates tailored to reflect local circumstances, based on analyses of secondary data. Currently, public health decision makers face challenges in interpreting global review evidence to assess its meaning in local contexts. A lack of clarity on the definition and scope of generalisability, and the absence of consensus on its measurement, has stunted methodological progress. The consequence of failing to tackle generalisability means that systematic review evidence often fails to fulfil its potential contribution in public health decision making. Three approaches to address these problems are considered and emerging challenges discussed: (1) purposeful exploration after a review has been conducted, and we present a framework of potential avenues of enquiry and a worked example; (2) recalibration of the results to weight studies differentially based on their similarity to conditions in an inference population, and we provide a worked example using UK Census data to understand potential differences in the effectiveness of community engagement interventions among sites in England and Wales; (3) purposeful exploration before starting a review to ensure that the findings are relevant to an inference population. The paper aims to demonstrate how a more nuanced treatment of context in reviews of public health interventions could be achieved through greater engagement with existing large sources of secondary data. [ABSTRACT FROM AUTHOR]

Poland's accession to the European Union in May 2004 brought many new possibilities and opportunities for Polish migrants to the United Kingdom. However, the focus on individual migrants has underestimated the complex roles of families in migration strategies and decision making. This paper brings together data from two studies of Polish migrants in London. In 2006-2007, we carried out a qualitative study, Recent Polish Migrants in London. That research examined how families may be reconfigured in different ways through migration, for example, transnational networks and splits within families. While the study participants represented varied examples of family reunification, they also revealed the complex decision making processes about leaving, staying, rejoining and returning. In our most recent study, Polish Children in London Primary Schools, we interviewed parents, who had migrated with children, about their experiences and expectations of London schools. This study revealed that the age of children was usually a factor in family migration decision making. There was a common expectation that younger children could easily adapt to a new school and learn English quickly. Drawing on the findings of these two studies, this paper will explore firstly, the variety of family migration strategies and secondly, the factors that inform migrants' decisions to bring their families (especially children) or to leave them back home. Finally, the paper concludes by considering some of the policy implications of our findings. [ABSTRACT FROM AUTHOR]