Adherence and Association of Digital Proximity Tracing App Notifications With Earlier Time to Quarantine: Results From the Zurich SARS-CoV-2 Cohort Study.

Adherence and Association of Digital Proximity Tracing App Notifications With Earlier Time to Quarantine: Results From the Zurich SARS-CoV-2 Cohort Study.
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DOI:
10.3389/ijph.2021.1603992
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发表时间:
2021
影响因子:
4.6
通讯作者:
von Wyl V
von Wyl V
中科院分区:
医学3区
文献类型:
--
作者:
Ballouz T;Menges D;Aschmann HE;Domenghino A;Fehr JS;Puhan MA;von Wyl V

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目的:我们旨在评估SwissCovid数字邻近追踪(DPT)应用程序在通知暴露个体并促使他们更早隔离方面的有效性,与仅通过手动接触者追踪(MCT)通知的个体相比。研究方法:对来自苏黎世SARS-CoV-2队列的病例和密切接触者的基于人群的样本进行了关于SwissCovid应用程序使用和SARS-CoV-2暴露的调查。我们分析了应用程序的依从性和有效性,并使用分层多变量事件发生时间分析评估了其对接触者暴露和隔离之间时间的影响。结果:共纳入SARS冠状病毒2型感染者393例,密切接触者261例。62%的病例报告使用了SwissCovid,其中88%收到并上传了通知代码。71%的密切接触者是应用程序用户,其中38%收到了警告。SwissCovid通知的非家庭接触者提前1天开始隔离,并且比应用程序未警告的人更有可能提前隔离(HR 1.53,95% CI 1.15-2.03)。结论:这些发现提供的证据表明,DPT可能比MCT更快地到达暴露接触者,更早地隔离和潜在的SARS-CoV-2传播链中断。
Objectives: We aimed to evaluate the effectiveness of the SwissCovid digital proximity tracing (DPT) app in notifying exposed individuals and prompting them to quarantine earlier compared to individuals notified only by manual contact tracing (MCT). Methods: A population-based sample of cases and close contacts from the Zurich SARS-CoV-2 Cohort was surveyed regarding SwissCovid app use and SARS-CoV-2 exposure. We descriptively analyzed app adherence and effectiveness, and evaluated its effects on the time between exposure and quarantine among contacts using stratified multivariable time-to-event analyses. Results: We included 393 SARS-CoV-2 infected cases and 261 close contacts. 62% of cases reported using SwissCovid and among those, 88% received and uploaded a notification code. 71% of close contacts were app users, of which 38% received a warning. Non-household contacts notified by SwissCovid started quarantine 1 day earlier and were more likely to quarantine earlier than those not warned by the app (HR 1.53, 95% CI 1.15–2.03). Conclusion: These findings provide evidence that DPT may reach exposed contacts faster than MCT, with earlier quarantine and potential interruption of SARS-CoV-2 transmission chains.
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影响因子: 8.5
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