期刊文章%@ 2369-2960 %I JMIR Publicatio卡塔尔世界杯8强波胆分析ns %V 8 %N 5 %P e35653 %T在SwissCovid数字接近追踪应用程序中暴露通知级联的个体级评估:观察研究%A Ballouz,Tala %A Menges, dominic %A Aschmann,Hélène E %A Jung,Ruedi %A Domenghino,Anja %A Fehr,Jan S %A Puhan,Milo A %A von Wyl,Viktor %+卫生保健实施科学研究所，苏黎世大学，Universitätstrasse 84，苏黎世，8006，瑞士，41 44 63 46380，viktor.vonwyl@uzh.ch %K数字接近追踪%K接触者追踪%K SwissCovid %K移动应用程序%K COVID-19 %K SARS-CoV-2 %K流行病学%K公共卫生%K跟踪%K监测%K应用程序%K mHealth %K评估%K暴露%K通知%K观察%D 2022 %7 19.5.2022 %9原始论文%J JMIR公共卫生监测%G英语%X背景:数字接近追踪(DPT)旨在补充手工接触追踪(MCT)，以识别暴露接触者，防止SARS-CoV-2在人群中进一步传播。尽管包括SwissCovid在内的一些百日破伤风防治应用程序已显示出在缓解大流行方面有很好的效果，但一些挑战阻碍了它们充分实现预期结果。现在的一个关键问题是如何提高DPT的效率，这需要更好地了解影响其过程的因素。目的:在本研究中，我们旨在对接触通报(EN)级联进行详细审查，并评估在不同接触环境下的病例和接触者成功收到接触通报以及随后采取的行动的潜在环境影响。方法:我们使用的数据来自285对sars - cov -2感染病例及其接触者，这些数据来自一项观察队列研究，研究对象是2020年8月6日至2021年1月17日在瑞士苏黎世登记的病例和经MCT确认的接触者。我们用电子问卷调查参与者。根据暴露设置对数据进行描述性总结和分层。 Results: We found that only 79 (58.5%) of 135 contacts using the SwissCovid app whose corresponding cases reported to have triggered the EN also received one. Of these, 18 (22.8%) received the EN before MCT. Compared to those receiving an EN after MCT (61/79, 77.2%), we observed that a higher proportion of contacts receiving an EN before MCT were exposed in nonhousehold settings (11/18, 61.1%, vs 34/61, 55.7%) and their corresponding cases had more frequently reported mild-to-moderate symptoms (14/18, 77.8%, vs 42/61, 68.9%). Of the 18 contacts receiving an EN before MCT, 14 (77.8%) took recommended measures: 12 (66.7%) were tested for SARS-CoV-2, and 7 (38.9%) called the SwissCovid Infoline. In nonhousehold settings, the proportion of contacts taking preventive actions after receiving an EN was higher compared to same-household settings (82%, vs 67%). In addition, 1 (9%) of 11 ENs received in the nonhousehold setting before MCT led to the identification of a SARS-CoV-2-infected case by prompting the contact to get tested. This corresponds to 1 in 85 exposures of a contact to a case in a nonhousehold setting, in which both were app users and the case triggered the EN. Conclusions: Our descriptive evaluation of the DPT notification cascade provides further evidence that DPT is an important complementary tool in pandemic mitigation, especially in nonhousehold exposure settings. However, the effect of DPT apps can only be exerted if code generation processes are efficient and exposed contacts are willing to undertake preventive actions. This highlights the need to focus efforts on keeping barriers to efficient code generation as low as possible and promoting not only app adoption but also compliance with the recommended measures upon an EN. Trial Registration: International Standard Randomised Controlled Trial Number Registry 14990068; https://doi.org/10.1186/ISRCTN14990068 %M 35476726 %R 10.2196/35653 %U https://publichealth.www.mybigtv.com/2022/5/e35653 %U https://doi.org/10.2196/35653 %U http://www.ncbi.nlm.nih.gov/pubmed/35476726