School of Health Administration, Dalhousie University, Halifax, Nova Scotia, Canada
Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
BMJ Open. 2022 Apr 27;12(4):e061660. doi: 10.1136/bmjopen-2022-061660.
Poor diet is a leading preventable risk for the global burden of non-communicable disease. Robust measurement is needed to determine the effect of COVID-19 on dietary intakes and consumer purchasing, given the widespread changes to consumer food environments and economic precarity. The research objectives are as follows: (1) describe dietary intakes of foods, beverages and nutrients of concern during the COVID-19 pandemic; (2) quantify change in diet during COVID-19 as compared with prepandemic, previously captured in the provincial samples of the population-representative 2015 Canadian Community Health Survey-Nutrition and (3) examine how household purchasing practices predict dietary intakes during COVID-19.
Observational study of diet, using a population-based stratified probability sampling strategy allocated via dual-frame (landline and cellphone) calls to random-digit dialled numbers, followed by age-sex group quotas. The base population comprises the four provinces of the Atlantic region of Canada, jurisdictions with an excess burden of pre-existing dietary risk, compared with the rest of Canada. Our aim is n=1000 to obtain reliable estimates at a regional level to describe intakes and compare with prepandemic baseline. Data collection entails 12 weeks participation: (1) enrolment with sociodemographics (key dietary risk predictors such as age, sex, gender, pre-COVID-19 income, employment, household composition, receipt of economic relief, rural residence); (2) two 24hour diet recalls using the online ASA-24 Canada 2018 tool; and (3) online uploads of household food purchase receipts over the 12 weeks enrolled. Participation incentives will be offered.
This research protocol received funding from the Canadian Institutes of Health Research (FRN VR5 172691) and ethics review approval from the Dalhousie University Research Ethics Board. Study protocol and instruments and a de-identified dataset will be made publicly available. We will submit the findings to peer-reviewed journals, as well as conferences geared towards scientific and decision-maker audiences.
不良饮食是全球非传染性疾病负担的主要可预防风险因素。鉴于消费者食品环境和经济不稳定发生了广泛变化，需要进行强有力的衡量，以确定 COVID-19 对饮食摄入和消费者购买的影响。研究目标如下：（1）描述 COVID-19 大流行期间人们对关注食品、饮料和营养物的饮食摄入情况；（2）量化 COVID-19 期间的饮食变化，与之前在省级人群代表性 2015 年加拿大社区健康调查-营养中捕获的大流行前饮食数据进行比较；（3）研究家庭购买行为如何预测 COVID-19 期间的饮食摄入。
这是一项关于饮食的观察性研究，采用基于人群的分层概率抽样策略，通过双框架（固定电话和移动电话）呼叫分配随机数字拨号号码，然后根据年龄-性别组配额进行分配。基础人群包括加拿大大西洋地区的四个省份，与加拿大其他地区相比，这些司法管辖区的预先存在的饮食风险负担过重。我们的目标是在 n=1000 人水平上获得可靠的估计值，以在区域层面描述饮食情况并与大流行前基线进行比较。数据收集需要 12 周的参与时间：（1）登记社会人口统计学信息（关键饮食风险预测因素，如年龄、性别、性别、大流行前收入、就业、家庭构成、获得经济救济、农村居住）；（2）使用在线 ASA-24 加拿大 2018 工具进行两次 24 小时饮食回忆；（3）在登记的 12 周内，在线上传家庭食品购买收据。将提供参与激励措施。
本研究方案获得了加拿大卫生研究院（FRN VR5 172691）的资助，并获得了达尔豪斯大学研究伦理委员会的伦理审查批准。研究方案、工具和一个去识别数据集将公开提供。我们将把研究结果提交给同行评议期刊，并提交给面向科学家和决策者的会议。
