Time trends in social contacts before and during the COVID-19 pandemic: the CONNECT study.
Time trends in social contacts before and during the COVID-19 pandemic: the CONNECT study.
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DOI：
10.1186/s12889-022-13402-7
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发表时间：
2022-05-23
影响因子：
4.5
通讯作者：
Brisson, Marc
中科院分区：
文献类型：
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作者：
Drolet, Melanie;Godbout, Aurelie;Mondor, Myrto;Beraud, Guillaume;Drolet-Roy, Lea;Lemieux-Mellouki, Philippe;Bureau, Alexandre;Demers, Eric;Boily, Marie-Claude;Sauvageau, Chantal;De Serres, Gaston;Hens, Niel;Beutels, Philippe;Dervaux, Benoit;Brisson, Marc
自COVID-19大流行开始以来，包括加拿大在内的许多国家采取了前所未有的身体疏远措施，例如关闭学校和非必要企业，以及限制聚会和家庭探访。我们描述了加拿大魁北克省大流行前和大流行期间社会接触的时间趋势。 CONNECT 是一项基于人群的社会接触研究，在 COVID-19 大流行之前（2018/2019）和期间（2020 年 4 月至 2021 年 2 月）进行，两个时期使用相同的方法。我们通过随机数字拨号招募参与者，并通过自管理的网络问卷收集数据。调查问卷记录了指定两天的社会人口特征和社会联系。接触被定义为距离≤≤2米的双向对话或身体接触，无论是否掩蔽。我们使用具有泊松分布和鲁棒方差（考虑到可能的过度分散）的加权广义线性模型来比较随时间变化的社交接触的平均数量以及社会人口统计特征。在疫情爆发前和疫情期间，分别有 1291 名魁北克人和 5516 名魁北克人完成了这项研究。接触人数从大流行前的平均每天 8 人次大幅减少到 2020 年春季封锁期间的平均每天 3 人次。此后接触人数仍低于新冠疫情爆发之前的水平（2020/2021 年圣诞节假期期间每天接触人数最低 = 3 人，2020 年 9 月最高接触人数 = 5 人）。自大流行开始以来，工作中、休闲活动期间/其他地点以及在家中与访客的接触出现了最大程度的减少。自大流行开始以来，所有社会人口亚群体的接触都显着减少。混合矩阵说明了公共卫生措施（例如学校关闭、聚会限制）的影响，儿童/青少年之间的接触减少，同龄伴侣/兄弟姐妹之间以及儿童与其父母之间的接触的三个主要对角线之外的接触减少。魁北克省采取的保持社交距离的措施显着减少了社交接触，这很可能减缓了 COVID-19 的传播。在线版本包含可在 10.1186/s12889-022-13402-7 获取的补充材料。
Since the beginning of the COVID-19 pandemic, many countries, including Canada, have adopted unprecedented physical distancing measures such as closure of schools and non-essential businesses, and restrictions on gatherings and household visits. We described time trends in social contacts for the pre-pandemic and pandemic periods in Quebec, Canada. CONNECT is a population-based study of social contacts conducted shortly before (2018/2019) and during the COVID-19 pandemic (April 2020 – February 2021), using the same methodology for both periods. We recruited participants by random digit dialing and collected data by self-administered web-based questionnaires. Questionnaires documented socio-demographic characteristics and social contacts for two assigned days. A contact was defined as a two-way conversation at a distance ≤ 2 m or as a physical contact, irrespective of masking. We used weighted generalized linear models with a Poisson distribution and robust variance (taking possible overdispersion into account) to compare the mean number of social contacts over time and by socio-demographic characteristics. A total of 1291 and 5516 Quebecers completed the study before and during the pandemic, respectively. Contacts significantly decreased from a mean of 8 contacts/day prior to the pandemic to 3 contacts/day during the spring 2020 lockdown. Contacts remained lower than the pre-COVID period thereafter (lowest = 3 contacts/day during the Christmas 2020/2021 holidays, highest = 5 in September 2020). Contacts at work, during leisure activities/in other locations, and at home with visitors showed the greatest decreases since the beginning of the pandemic. All sociodemographic subgroups showed significant decreases of contacts since the beginning of the pandemic. The mixing matrices illustrated the impact of public health measures (e.g. school closure, gathering restrictions) with fewer contacts between children/teenagers and fewer contacts outside of the three main diagonals of contacts between same-age partners/siblings and between children and their parents. Physical distancing measures in Quebec significantly decreased social contacts, which most likely mitigated the spread of COVID-19. The online version contains supplementary material available at 10.1186/s12889-022-13402-7.