tetano
Editor, Senior Moderator
- Anders Husby[SUP]1,2[/SUP]
, Giulia Corn[SUP]2[/SUP] , Tyra Grove Krause[SUP]3[/SUP]
Infections with seasonally spreading coronaviruses are common among young children during winter months in the northern hemisphere; the immunological response lasts around a year. However, it is not clear if living with young children changes the risk of SARS-CoV-2 infection among adults.
Aim
Our aim was to investigate the association between living in a household with younger children and the risk of SARS-CoV-2 infections and hospitalisation.
Methods
In a nationwide cohort study, we followed all adults in Denmark aged 18 to 60 years from 27 February 2020 to 26 February 2021. Hazard ratios of SARS-CoV-2 infection by number of 10 months to 5 year-old children in the household were estimated using Cox regression adjusted for adult age, sex and other potential confounders. In a sensitivity analysis, we investigated the effect of the children's age.
Results
Among 450,007 adults living in households with young children, 19,555 were tested positive for SARS-CoV-2, while among 2,628,500 adults without young children in their household, 110,069 were tested positive for SARS-CoV-2 (adjusted hazard ratio (aHR) = 1.10; 95% confidence interval (CI): 1.08–1.12). Among adults with young children, 620 were hospitalised with SARS-CoV-2, while 4,002 adults without children were hospitalised with SARS-CoV-2 (aHR = 0.97; 95% CI: 0.88–1.08). Sensitivity analyses found that an increasing number of younger children substantially increased the risk of SARS-CoV-2 infection but not hospitalisation.
Conclusion
Living in a household with young children was associated with a small increased risk of SARS-CoV-2 infection.
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.32.2101096#html_fulltext