Do neighbourhood environments contribute to ethnic differences in obesity, physical activity and diets?

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Halting the rise in obesity is a policy priority as reflected in a range of government initiatives on diet and physical activity in schools and the community, and on legislation to promote a food classification system to make choosing healthy food easy. Ethnic differences in obesity are well known but the cause is poorly understood. This study seeks to understand if the context of where people live plays a role, whether it affects physical exercise and dietary patterns and their body size. Ethnic minorities tend to live in poor urban areas and these areas might be less well served with facilities for physical activity or might be felt to too unsafe to take up physical exercise. Fast food outlets are known to be more common in deprived areas. Ethnic minorities living in (predominantly White) affluent areas may have better access healthy foods and take more exercise than those living in poor areas. These issues have relevance to policies that aim to help people from different backgrounds to engage in healthy lifestyles and to prevent obesity. For example, if both poor access to recreational facilities and high concentration of South Asians in areas were associated with low physical activity in South Asian women, it would be important to consider culturally appropriate ways of providing these facilities. We will use national surveys that hold data about physical activity, diet, body size on individuals from ethnic minority groups. We will also use a range of data that describe the context of the areas people live in such as the size of ethnic minority populations living in an area, the poverty level of areas, the crime rates in areas, and the number of fast food outlets and gyms and how far these are from where people live. These data will allow us to examine the extent to which the obesity, physical activity and dietary patterns in ethnic minority groups are shaped by the places they live.