RT Journal Article T1 Age-dependent impact of the major common genetic risk factor for COVID-19 on severity and mortality. A1 Nakanishi, Tomoko A1 Pigazzini, Sara A1 Degenhardt, Frauke A1 Cordioli, Mattia A1 Butler-Laporte, Guillaume A1 Maya-Miles, Douglas A1 Nafría-Jiménez, Beatriz A1 Bouysran, Youssef A1 Niemi, Mari A1 Palom, Adriana A1 Ellinghaus, David A1 Khan, Atlas A1 Martínez-Bueno, Manuel A1 Rolker, Selina A1 Amitano, Sara A1 Tato, Luisa Roade A1 FinnGen, The COVID-19 Host Genetics Initiative A1 Fava, Francesca A1 Spinner, Christoph D A1 Prati, Daniele A1 Bernardo, David A1 Garcia, Federico A1 Darcis, Gilles A1 Fernández-Cadenas, Israel A1 Holter, Jan Cato A1 Banales, Jesus A1 Frithiof, Robert A1 Kiryluk, Krzysztof A1 Duga, Stefano A1 Asselta, Rosanna A1 Pereira, Alexandre C A1 Romero-Gómez, Manuel A1 Bujanda, Luis A1 Hov, Johannes R A1 Migeotte, Isabelle A1 Renieri, Alessandra A1 Planas, Anna M A1 Ludwig, Kerstin U A1 Buti, Maria A1 Rahmouni, Souad A1 Alarcón-Riquelme, Marta E A1 Schulte, Eva C A1 Franke, Andre A1 Karlsen, Tom H A1 Valenti, Luca A1 Zeberg, Hugo A1 Richards, J Brent A1 Ganna, Andrea AB There is considerable variability in COVID-19 outcomes amongst younger adults-and some of this variation may be due to genetic predisposition. We characterized the clinical implications of the major genetic risk factor for COVID-19 severity, and its age-dependent effect, using individual-level data in a large international multi-centre consortium. The major common COVID-19 genetic risk factor is a chromosome 3 locus, tagged by the marker rs10490770. We combined individual level data for 13,424 COVID-19 positive patients (N=6,689 hospitalized) from 17 cohorts in nine countries to assess the association of this genetic marker with mortality, COVID-19-related complications and laboratory values. We next examined if the magnitude of these associations varied by age and were independent from known clinical COVID-19 risk factors. We found that rs10490770 risk allele carriers experienced an increased risk of all-cause mortality (hazard ratio [HR] 1·4, 95% confidence interval [CI] 1·2-1·6) and COVID-19 related mortality (HR 1·5, 95%CI 1·3-1·8). Risk allele carriers had increased odds of several COVID-19 complications: severe respiratory failure (odds ratio [OR] 2·0, 95%CI 1·6-2·6), venous thromboembolism (OR 1·7, 95%CI 1·2-2·4), and hepatic injury (OR 1·6, 95%CI 1·2-2·0). Risk allele carriers ≤ 60 years had higher odds of death or severe respiratory failure (OR 2·6, 95%CI 1·8-3·9) compared to those > 60 years OR 1·5 (95%CI 1·3-1·9, interaction p-value=0·04). Amongst individuals ≤ 60 years who died or experienced severe respiratory COVID-19 outcome, we found that 31·8% (95%CI 27·6-36·2) were risk variant carriers, compared to 13·9% (95%CI 12·6-15·2%) of those not experiencing these outcomes. Prediction of death or severe respiratory failure among those ≤ 60 years improved when including the risk allele (AUC 0·82 vs 0·84, p=0·016) and the prediction ability of rs10490770 risk allele was similar to, or better than, most established clinical risk factors. The major common COVID-19 risk locus on chromosome 3 is associated with increased risks of morbidity and mortality-and these are more pronounced amongst individuals ≤ 60 years. The effect on COVID-19 severity was similar to, or larger than most established risk factors, suggesting potential implications for clinical risk management. Funding was obtained by each of the participating cohorts individually. YR 2021 FD 2021-03-12 LK https://hdl.handle.net/10668/25276 UL https://hdl.handle.net/10668/25276 LA en DS RISalud RD Apr 5, 2025