Spatial Sciences Institute, University of Southern California, United States.
Department of Population and Public Health Sciences, University of Southern California, United States.
Spat Spatiotemporal Epidemiol. 2022 Jun;41:100502. doi: 10.1016/j.sste.2022.100502. Epub 2022 Mar 24.
Pregnant women's daily time-activity and mobility patterns determine their environmental exposures and subsequently related health effects. Most studies ignore these and assess pregnancy exposures using static residential measures.
We conducted 4-day continuous geo-location monitoring in 62 pregnant Hispanic women, during pregnancy and early post-partum then derived trips by mode and stays, classified by context (indoor/outdoor, type). Generalized mixed-effect models were used to examine whether these patterns changed over time.
Women spent on average 17.3 h/day at home. Commercial and service locations were the most popular non-home destinations, while parks and open spaces were seldom visited. Women made 3.5 daily trips (63.7 min/day and approximately 25% were pedestrian-based). Women were less likely to visit commercial and services locations and make vehicle-based trips postpartum compared to the 3 trimester.
Our findings suggest time-activity patterns vary across pregnancy and postpartum, thus assessing exposures at stationary locations might introduce measurement error.
孕妇的日常时间活动和移动模式决定了她们的环境暴露情况，进而影响相关健康效应。大多数研究忽略了这一点，而是使用静态的居住措施来评估孕期暴露情况。
我们对 62 名拉丁裔孕妇在孕期和产后早期进行了为期 4 天的连续地理定位监测，然后根据模式和停留时间（室内/室外、类型）将出行分类。采用广义混合效应模型来检验这些模式是否随时间发生变化。
女性平均每天在家中度过 17.3 小时。商业和服务场所是最受欢迎的非家庭目的地，而公园和开放空间则很少有人光顾。女性每天进行 3.5 次出行（每天 63.7 分钟，其中约 25%是步行出行）。与孕早期相比，女性在产后较少前往商业和服务场所，也较少进行以车辆为基础的出行。
我们的研究结果表明，孕妇的时间活动模式在孕期和产后期间存在差异，因此，在静止位置评估暴露情况可能会引入测量误差。
