{"id":7932,"date":"2020-07-02T20:05:21","date_gmt":"2020-07-03T03:05:21","guid":{"rendered":"https:\/\/depts.washington.edu\/pandemicalliance\/?p=7932"},"modified":"2021-03-29T20:06:26","modified_gmt":"2021-03-30T03:06:26","slug":"risk-factors-associated-with-covid-19-infection-a-retrospective-cohort-study-based-on-contacts-tracing","status":"publish","type":"post","link":"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/07\/02\/risk-factors-associated-with-covid-19-infection-a-retrospective-cohort-study-based-on-contacts-tracing\/","title":{"rendered":"Risk Factors Associated with COVID-19 Infection: A Retrospective Cohort Study Based on Contacts Tracing"},"content":{"rendered":"<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"34\" data-aria-posinset=\"2019\" data-aria-level=\"1\"><span data-contrast=\"auto\">In a<\/span><span data-contrast=\"auto\">\u00a0retrospective cohort study<\/span><span data-contrast=\"auto\">\u00a0of<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">11,580 contacts of COVID-19 cases in Guangdong, China\u00a0<\/span><span data-contrast=\"auto\">t<\/span><span data-contrast=\"auto\">he overall risk\u00a0<\/span><span data-contrast=\"auto\">of SARS-CoV2-infection based on RT-PCR testing\u00a0<\/span><span data-contrast=\"auto\">was 4.<\/span><span data-contrast=\"auto\">5<\/span><span data-contrast=\"auto\">% (515\/11,580). Higher r<\/span><span data-contrast=\"auto\">isk<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">was\u00a0<\/span><span data-contrast=\"auto\">seen among children<\/span><span data-contrast=\"auto\">\u00a0(RR=2.6)<\/span><span data-contrast=\"auto\">\u00a0and old people<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">aged 60-69 years<\/span><span data-contrast=\"auto\">\u00a0(RR=5.3)\u00a0<\/span><span data-contrast=\"auto\">compared to young adults aged 20-29 years,\u00a0<\/span><span data-contrast=\"auto\">higher among\u00a0<\/span><span data-contrast=\"auto\">females\u00a0<\/span><span data-contrast=\"auto\">than males (RR=<\/span><span data-contrast=\"auto\">1.66), and\u00a0<\/span><span data-contrast=\"auto\">higher among\u00a0<\/span><span data-contrast=\"auto\">family members\u00a0<\/span><span data-contrast=\"auto\">of an\u00a0<\/span><span data-contrast=\"auto\">index cases<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">(spouse:\u00a0<\/span><span data-contrast=\"auto\">RR=<\/span><span data-contrast=\"auto\">20.<\/span><span data-contrast=\"auto\">7<\/span><span data-contrast=\"auto\">; non-spouse family members:\u00a0<\/span><span data-contrast=\"auto\">RR=<\/span><span data-contrast=\"auto\">9.<\/span><span data-contrast=\"auto\">6<\/span><span data-contrast=\"auto\">).\u00a0<\/span><span data-contrast=\"auto\">Infection risk was higher for c<\/span><span data-contrast=\"auto\">ontacts exposed to\u00a0<\/span><span data-contrast=\"auto\">an\u00a0<\/span><span data-contrast=\"auto\">index case<\/span><span data-contrast=\"auto\">\u00a0during the\u00a0<\/span><span data-contrast=\"auto\">symptomatic period (<\/span><span data-contrast=\"auto\">RR=<\/span><span data-contrast=\"auto\">2.<\/span><span data-contrast=\"auto\">2<\/span><span data-contrast=\"auto\">)<\/span><span data-contrast=\"auto\">\u00a0or to an index case with\u00a0<\/span><span data-contrast=\"auto\">critically severe symptoms (<\/span><span data-contrast=\"auto\">RR=<\/span><span data-contrast=\"auto\">1.6)<\/span><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><i><span data-contrast=\"none\">Liu et al. (July 1, 2020). Risk Factors Associated with COVID-19 Infection: A Retrospective Cohort Study Based on Contacts Tracing. Emerging Microbes &amp; Infections.\u00a0<\/span><\/i><a href=\"https:\/\/doi.org\/10.1080\/22221751.2020.1787799\"><span data-contrast=\"none\">https:\/\/doi.org\/10.1080\/22221751.2020.1787799<\/span><\/a><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:720,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In a\u00a0retrospective cohort study\u00a0of\u00a011,580 contacts of COVID-19 cases in Guangdong, China\u00a0the overall risk\u00a0of SARS-CoV2-infection based on RT-PCR testing\u00a0was 4.5% (515\/11,580). Higher risk\u00a0was\u00a0seen among children\u00a0(RR=2.6)\u00a0and old people\u00a0aged 60-69 years\u00a0(RR=5.3)\u00a0compared to young adults aged 20-29 years,\u00a0higher among\u00a0females\u00a0than males (RR=1.66), and\u00a0higher among\u00a0family members\u00a0of an\u00a0index cases\u00a0(spouse:\u00a0RR=20.7; non-spouse family members:\u00a0RR=9.6).\u00a0Infection risk was higher for contacts exposed to\u00a0an\u00a0index case\u00a0during the\u00a0symptomatic period&#8230;<\/p>\n<div><a class=\"more\" href=\"https:\/\/depts.washington.edu\/pandemicalliance\/2020\/07\/02\/risk-factors-associated-with-covid-19-infection-a-retrospective-cohort-study-based-on-contacts-tracing\/\">Read more<\/a><\/div>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[],"topic":[20],"class_list":["post-7932","post","type-post","status-publish","format-standard","hentry","category-article-summary","topic-clinical-characteristics-and-health-care-setting"],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/7932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/comments?post=7932"}],"version-history":[{"count":1,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/7932\/revisions"}],"predecessor-version":[{"id":7933,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/posts\/7932\/revisions\/7933"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/media?parent=7932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/categories?post=7932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/tags?post=7932"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/depts.washington.edu\/pandemicalliance\/wp-json\/wp\/v2\/topic?post=7932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}