Geographers and public health researchers have long been interested in social, spatial, and economic factors that drive access and exposure to food retail. A growing body of evidence draws on mobility data to capture locations accessed by individuals beyond the home address. Given that food-related activities are shared by household members and often gendered, taking an individual-level approach might limit researchers’ ability to accurately describe access to food retail. Using data that includes Global Positioning System trajectories of forty-six adults from twenty-one households in Toronto, this study compares access to food retailers at the individual and household levels and evaluates measurement issues that arise when relying on one household member. Spatial and spatiotemporal measures of access were derived from individual and total household activity spaces. Differences in access were tested for men and women and moderating effects of neighborhood, shopping responsibility, car access, and employment status were investigated. Supermarket density was greater for women when compared with men in the household, as well as their total household measure. Additionally, within-household differences in counts of supermarkets were moderated by neighborhood. Future research should consider the role of place and the contributions of household members when measuring access to food at the individual level.

长期以来，地理学家和公共卫生研究人员一直对推动食品零售的获取和接触的社会、空间和经济因素感兴趣。越来越多的证据利用移动数据来捕获个人在家庭地址之外访问的位置。鉴于与食品相关的活动由家庭成员共享且通常具有性别差异，因此采用个人层面的方法可能会限制研究人员准确描述食品零售渠道的能力。本研究使用包括来自多伦多 21 个家庭的 46 名成年人的全球定位系统轨迹的数据，比较了个人和家庭层面的食品零售商的访问情况，并评估了依赖一名家庭成员时出现的测量问题。访问的空间和时空测量来自个人和总的家庭活动空间。对男性和女性的访问差异进行了测试，并调查了邻里、购物责任、汽车访问和就业状况的调节作用。与家庭中的男性相比，女性的超市密度以及她们的家庭总规模更大。此外，家庭内部超市数量的差异因社区而异。未来的研究在衡量个人获得食物的机会时，应考虑地方的作用和家庭成员的贡献。与家庭中的男性相比，女性的超市密度以及她们的家庭总规模更大。此外，家庭内部超市数量的差异因社区而异。未来的研究在衡量个人获得食物的机会时，应考虑地方的作用和家庭成员的贡献。与家庭中的男性相比，女性的超市密度以及她们的家庭总规模更大。此外，家庭内部超市数量的差异因社区而异。未来的研究在衡量个人获得食物的机会时，应考虑地方的作用和家庭成员的贡献。