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Mean (95% CI) BMI per quartile of fast-food outlet exposure in the Fenland Study (n = 10,798), stratified by genetic risk score for BMI (BMI-GRS, split by sample median: low ≤ 2.29; high > 2.29), adjusted for age, sex, household income, highest educational attainment, car access, smoking status, physical activity energy expenditure, counts of supermarkets in home neighbourhoods
