{"id":26541,"date":"2024-09-25T04:59:00","date_gmt":"2024-09-24T20:59:00","guid":{"rendered":"http:\/\/csccm.org.cn\/?p=26541"},"modified":"2024-09-25T05:40:41","modified_gmt":"2024-09-24T21:40:41","slug":"bmj%e5%8f%91%e8%a1%a8%e8%ae%ba%e6%96%87%ef%bc%9a%e5%85%ac%e5%85%b1%e5%9c%ba%e5%90%88%e4%bd%a9%e6%88%b4%e5%a4%96%e7%a7%91%e5%8f%a3%e7%bd%a9%e5%af%b9%e6%88%90%e4%ba%ba%e8%87%aa%e6%88%91%e6%8a%a5","status":"publish","type":"post","link":"https:\/\/csccm.org.cn\/?p=26541","title":{"rendered":"[BMJ\u53d1\u8868\u8bba\u6587]\uff1a\u516c\u5171\u573a\u5408\u4f69\u6234\u5916\u79d1\u53e3\u7f69\u5bf9\u6210\u4eba\u81ea\u6211\u62a5\u544a\u547c\u5438\u9053\u75c7\u72b6\u7684\u4fdd\u62a4\u4f5c\u7528"},"content":{"rendered":"\n

Research<\/strong><\/p>\n\n\n\n

Personal protective effect of wearing surgical face masks in public spaces on self-reported respiratory symptoms in adults: pragmatic randomised superiority trial<\/h1>\n\n\n\n

Runar Barstad Solberg<\/a>, Atle Fretheim, Ingeborg Hess Elgersma,\u00a0et ak<\/h3>\n\n\n\n

BMJ<\/em>\u00a02024;\u00a0386\u00a0doi:\u00a0https:\/\/doi.org\/10.1136\/bmj-2023-078918<\/a>\u00a0(Published 24 July 2024)<\/h3>\n\n\n\n

Cite this as:\u00a0BMJ<\/em>\u00a02024;386:e078918<\/h3>\n\n\n\n

Abstract<\/h2>\n\n\n\n

Objective<\/strong> To evaluate the personal protective effects of wearing versus not wearing surgical face masks in public spaces on self-reported respiratory symptoms over a 14 day period.<\/p>\n\n\n\n

Design<\/strong> Pragmatic randomised superiority trial.<\/p>\n\n\n\n

Setting<\/strong> Norway.<\/p>\n\n\n\n

Participants<\/strong> 4647 adults aged \u226518 years: 2371 were assigned to the intervention arm and 2276 to the control arm.<\/p>\n\n\n\n

Interventions<\/strong> Participants in the intervention arm were assigned to wear a surgical face mask in public spaces (eg, shopping centres, streets, public transport) over a 14 day period (mask wearing at home or work was not mentioned). Participants in the control arm were assigned to not wear a surgical face mask in public places.<\/p>\n\n\n\n

Main outcome measures<\/strong> The primary outcome was self-reported respiratory symptoms consistent with a respiratory infection. Secondary outcomes included self-reported and registered covid-19 infection.<\/p>\n\n\n\n

Results<\/strong>\u00a0Between 10 February 2023 and 27 April 2023, 4647 participants were randomised of whom 4575 (2788 women (60.9%); mean age 51.0 (standard deviation 15.0) years) were included in the intention-to-treat analysis: 2313 (50.6%) in the intervention arm and 2262 (49.4%) in the control arm. 163 events (8.9%) of self-reported symptoms consistent with respiratory infection were reported in the intervention arm and 239 (12.2%) in the control arm. The marginal odds ratio was 0.71 (95% confidence interval (CI) 0.58 to 0.87; P=0.001) favouring the face mask intervention. The absolute risk difference was \u22123.2% (95% CI \u22125.2% to \u22121.3%; P<0.001). No statistically significant effect was found on self- reported (marginal odds ratio 1.07, 95% CI 0.58 to 1.98; P=0.82) or registered covid-19 infection (effect estimate and 95% CI not estimable owing to lack of events in the intervention arm).<\/p>\n\n\n\n

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Conclusion<\/strong> Wearing a surgical face mask in public spaces over 14 days reduces the risk of self-reported symptoms consistent with a respiratory infection, compared with not wearing a surgical face mask.<\/p>\n\n\n\n

Trial registration<\/strong> ClinicalTrials.gov NCT05690516<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Research Personal protective effect of wearing surgical […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[32,23],"tags":[],"_links":{"self":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/26541"}],"collection":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26541"}],"version-history":[{"count":1,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/26541\/revisions"}],"predecessor-version":[{"id":26542,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=\/wp\/v2\/posts\/26541\/revisions\/26542"}],"wp:attachment":[{"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csccm.org.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}