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During the congress, E-Posters will be accessible to all participants on the congress website 24/7, as well as in the E-poster stations in the congress center.
Preparing your E-Poster
Please review the E-Poster format requirements carefully when preparing your E-Poster. Should your E-Poster not meet the mentioned requirements, it may not be displayed as described above.
E-Poster Submission Deadline
Please prepare and upload your E-Poster no later than March 14, 2026 11.59PM CET. After this date, you will no longer be able to prepare and upload your E-poster and it will not be displayed and accessible on the congress website.
Please follow the instructions below to input your abstract title.
Abstract titles should be brief and reflect the content of the abstract.
Although the SARS-CoV-2 Omicron variant demonstrates lower mortality than previous variants in the general population, its mortality risk in immunocompromised kidney transplant recipients (KTRs)remains concerning. The present study compared Omicron-related mortality with that of seasonal influenza in KTRs.
Using the National Database of Health Insurance Claims of Japan, we conducted a retrospective cohort study of KTRs diagnosed with COVID-19 during the Omicron period (January 2022-March 2023) or influenza (September 2017-March 2023). The primary outcome was 30-day all-cause mortality. Inverse probability of treatment weighting (IPTW) based on propensity scores was employed to adjust for confounding factors. Subgroup analyses were performed stratified by age groups (20–49, 50–59, 60–69, and ≥70 years).
We identified 6,488 COVID-19 and 5,347 influenza cases. After IPTW, the 30-day mortality rates were 1.2% for COVID-19 and 0.2% for influenza (hazard ratio [HR] 4.07 [95% CI 2.18, 7.59]). In subgroup analyses stratified by age, adjusted HRs were as follows: 20–49 years, not estimable due to sparse events; 50–59 years, 2.06 (0.57, 7.48); 60–69 years, 6.52 (1.89, 22.48); and ≥70 years, 3.93 (1.62, 9.54). The adjusted absolute risk differences (excess deaths per 1,000 patients) were 0.1, 3.4, 17.3, and 35.0, respectively.
In this nationwide study, COVID-19 Omicron variant was associated with significantly higher mortality than influenza in KTRs. Age-stratified analyses demonstrated significantly elevated mortality in patients aged ≥60 years; however, further investigation is warranted in younger age groups given the limited number of events.
