Research on how socioeconomic status interacts with neighbourhood characteristics to influence disparities in obesity outcomes is currently limited by residential segregation-induced structural confounding, a lack of empirical studies outside the U.S. and other ‘Western’ contexts, and an over-reliance on cross-sectional analyses. This study addresses these challenges by examining how socioeconomic status modifies the effect of accumulated exposures to obesogenic neighbourhood environments on children and mothers’ BMI, drawing from a longitudinal mother-child birth cohort study in Singapore, an Asian city-state with relatively little residential segregation. We find that increased access to park connectors was associated with a decrease in BMI outcomes for mothers with higher socioeconomic status, but an increase for those with lower socioeconomic status. We also find that increased access to bus stops was associated with an increase in BMIz of children with lower socioeconomic status, but with a decrease in BMIz of children with higher socioeconomic status, while increased access to rail stations was associated with a decrease in BMIz of children with lower socioeconomic status only. Our results suggest that urban interventions might have heterogeneous effects by socioeconomic status.

目前，关于社会经济地位如何与邻里特征相互作用以影响肥胖结果差异的研究受到住宅隔离引起的结构性混杂、在美国和其他“西方”背景之外缺乏实证研究以及过度依赖横截面研究的限制。分析。本研究通过研究社会经济地位如何改变累积暴露于致肥胖社区环境对儿童和母亲 BMI 的影响来解决这些挑战，该研究来自新加坡的纵向母婴出生队列研究，新加坡是一个居住隔离相对较少的亚洲城邦. 我们发现，对于社会经济地位较高的母亲来说，使用公园连接器的机会增加与 BMI 结果的下降有关，但社会经济地位较低的人会增加。我们还发现，增加前往公共汽车站的机会与社会经济地位较低的儿童的 BMIz 增加有关，但与社会经济地位较高的儿童的 BMIz 下降有关，而增加前往火车站的机会与 BMIz 的下降有关仅限社会经济地位较低的儿童。我们的研究结果表明，城市干预可能会因社会经济地位而产生异质性影响。