4.5 Article

A Nationwide Observational Study of Chlamydia trachomatis Infections in Denmark during the COVID-19 Pandemic

期刊

ACTA DERMATO-VENEREOLOGICA
卷 102, 期 -, 页码 -

出版社

ACTA DERMATO-VENEREOLOGICA
DOI: 10.2340/actadv.v102.2324

关键词

chlamydia trachomatis; COVID-19; incidence; Denmark; disease surveillance

资金

  1. Novo Nordisk Foundation

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The study found that COVID-19 restrictions in Denmark had negligible effects on laboratory-confirmed C. trachomatis transmission. The first lockdown led to a reduction in testing and positive cases, while the second lockdown showed similar incidence rates to previous years.
The aim of this study was to determine whether COVID-19 restrictions had an impact on Chlamydia trachomatis infections compared with 2018 and 2019. A retrospective nationwide observational study was performed using monthly incidences of laboratoryconfirmed chlamydia cases and number of tests, obtained from Danish national surveillance data. Testing rates and positivity rates were compared using Poisson and logistic regression. The first Danish COVID-19 lockdown (12 March to 14 April 2020) resulted in a reduction in the number of chlamydia tests performed (rate ratio 0.72, 95% confidence interval 0.71-0.73) and a consequent reduction in the number of laboratory-identified cases (66.5 vs 88.3 per 100,000 population during the same period in 2018 to 2019). This period was followed by a return of testing and test positivity close to the level seen in 2018 to 2019. The second Danish COVID-19 lockdown (17 December to 31 March 2021) resulted in crude incidence rates of laboratory-confirmed chlamydia infection that were similar to the crude incidence rates seen during same period in 2018 to 2019. In conclusion, the Danish COVID-19 restrictions have had negligible effects on laboratory-confirmed C. trachomatis transmission.

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