Adult customers switch to online grocery shopping (OGS) to save time and to buy specialized products. Less is known about whether and under what circumstances elderly will switch to OGS. Building on the theory of planned behavior (TPB), this study examined how decision making, online shopping habits for edible and non-edible items, and active and motorized mobility limitations are associated with elderly’s OGS behaviour.

An online survey of 560 older individuals from two metropolitan regions in Quebec, Canada was conducted. We collected data on online shopping habits, difficulties walking, intentions to cease driving, and current frequency of grocery trips, together with related TPB constructs (intentions, self-reported OGS behavior, behavioral, normative and control beliefs, attitudes, subjective norms and perceived behavioral control). After verifying the basic TPB model, difficulties walking, driving cessation, frequency of grocery trips and online shopping habits for edible and non-edible items were integrated in structural equation models.

Results support physical and motorized mobility loss and acquired OGS habits as decisive conditions for future OGS, along with attitudes and subjective norms as strong drivers of OGS intention formation. Shopping online for non-edible items did not predict OGS behavior. Getting past a first trial seemed much more important than technological difficulties in transitioning to OGS in our sample.

OGS can successfully replace grocery trips as mobility declines. The recent COVID-19 related surges in forced OGS might trigger wider longer-term adoption in this population segment. Driving cessation programs should consider integrating OGS training to replace grocery trips prior to mobility loss.

成年顾客转向在线杂货店购物 (OGS) 以节省时间并购买专门的产品。关于老年人是否以及在什么情况下会转向 OGS 知之甚少。本研究以计划行为 (TPB) 理论为基础，研究了决策、食用和非食用物品的在线购物习惯以及主动和机动行动受限与老年人 OGS 行为之间的关系。

对来自加拿大魁北克省两个大都市区的 560 名老年人进行了在线调查。我们收集了关于网上购物习惯、行走困难、停止驾驶的意图和当前杂货旅行频率的数据，以及相关的 TPB 结构（意图、自我报告的 OGS 行为、行为、规范和控制信念、态度、主观规范和感知行为控制）。在验证基本 TPB 模型后，将步行困难、停止驾驶、杂货旅行频率和可食用和不可食用物品的网上购物习惯整合到结构方程模型中。

结果支持身体和机动性丧失和获得的 OGS 习惯作为未来 OGS 的决定性条件，以及态度和主观规范作为 OGS 意图形成的强大驱动力。在线购买非食用物品并不能预测 OGS 行为。在我们的样本中，通过第一次试验似乎比过渡到 OGS 的技术困难重要得多。

随着流动性下降，OGS 可以成功取代杂货旅行。最近与 COVID-19 相关的强制 OGS 激增可能会引发该人群更广泛的长期采用。停止驾驶计划应考虑整合 OGS 培训，以取代行动不便之前的杂货旅行。