Non-pharmaceutical interventions (NPIs) have been widely implemented to mitigate the spread of COVID-19. We assessed the effect of NPIs on hospitalisations for pneumonia, influenza, COPD and asthma. This retrospective, ecological study compared the weekly incidence of hospitalisation for four respiratory conditions before (January 2016–January 2020) and during (February–July 2020) the implementation of NPI against COVID-19. Hospitalisations for all four respiratory conditions decreased substantially during the intervention period. The cumulative incidence of admissions for COPD and asthma was 58% and 48% of the mean incidence during the 4 preceding years, respectively.

中文翻译：

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COVID-19 大流行期间呼吸系统疾病住院人数减少：一项全国范围内的理赔研究

非药物干预措施 (NPI) 已被广泛实施，以减轻 COVID-19 的传播。我们评估了 NPI 对肺炎、流感、慢性阻塞性肺病和哮喘住院的影响。这项回顾性生态研究比较了针对 COVID-19 的 NPI 实施之前（2016 年 1 月至 2020 年 1 月）和实施期间（2020 年 2 月至 7 月）四种呼吸系统疾病的每周住院发生率。在干预期间，所有四种呼吸系统疾病的住院人数均大幅减少。过去 4 年因 COPD 和哮喘入院的累计发病率分别为平均发病率的 58% 和 48%。