Association of Early Aspirin Use With In-Hospital Mortality in Patients With Moderate COVID-19
Authors: Jonathan H. Chow, Ali Rahnavard, Mardi Gomberg-Maitland, Ranojoy Chatterjee, Pranay Patodi, David P. Yamane, Andrea R. Levine, Danielle Davison, Katrina Hawkins, Amanda M. Jackson, Megan T. Quintana, Allison S. Lankford, Ryan J. Keneally, Mustafa Al-Mashat, Daniel Fisher, Jeffrey Williams, Jeffrey S. Berger, Michael A. Mazzeffi, Keith A. Crandall, Ivy Benjenk, Benjamin Amor, Christopher Austin, Tellen Bennett, Mark Bissell, Samuel Bozzette, Katie Bradwell, Carolyn Bramante, Yooree Chae, Christopher Chute, Marshall Clark, Conor Cook, Mariam Deacy, Alexandra Dest, Racquel Dietz, Thomas Dillon, David Eichmann, Patricia Francis, Rafel Fuentes, Davera Gabriel, Nicole Garbarini, Kenneth Gersing, Andrew Girvin, Alexis Graves, Justin Guinney, Melissa Haendel, Jeremy Harper, Wenndy Hernandez, Stephanie Hong, Warren Kibbe, Farrukh Koraishy, Kristin Kostka, Michael Kurilla, Adam Lee, Harold Lehmann, Hongfang Liu, Amin Manna, Federico Mariona, Julie McMurry, Sam Michael, Robert Miller, Richard Moffitt, Michele Morris, Andrew Neumann, Shawn O'Neil, Matvey Palchuk, Philip Payne, Emily Pfaff, Nabeel Qureshi, Peter Robinson, Joni Rutter, Joel Saltz, Mary Saltz, Amit Saha, Usman Sheikh, Heidi Spratt, Justin Starren, Christine Suver, Meredity Temple-O'Connor, Satyanarayana Vedula, Andrea Volz, Anita Walden, Kellie Walters, Adam Wilcox, Andew Williams, Chunlei Wu, Elizabeth Zampino, Ziaohan Zhang, Richard Zhu
Journal: JAMA Network Open (2022)

Prior observational studies suggest that aspirin use may be associated with reduced mortality in high-risk hospitalized patients with COVID-19, but aspirin's efficacy in patients with moderate COVID-19 is not well studied.To assess whether early aspirin use is associated with lower odds of in-hospital mortality in patients with moderate COVID-19.Observational cohort study of 112 269 hospitalized patients with moderate COVID-19, enrolled from January 1, 2020, through September 10, 2021, at 64 health systems in the United States participating in the National Institute of Health's National COVID Cohort Collaborative (N3C).Aspirin use within the first day of hospitalization.The primary outcome was 28-day in-hospital mortality, and secondary outcomes were pulmonary embolism and deep vein thrombosis. Odds of in-hospital mortality were calculated using marginal structural Cox and logistic regression models. Inverse probability of treatment weighting was used to reduce bias from confounding and balance characteristics between groups.Among the 2 446 650 COVID-19-positive patients who were screened, 189 287 were hospitalized and 112 269 met study inclusion. For the full cohort, Median age was 63 years (IQR, 47-74 years); 16.1% of patients were African American, 3.8% were Asian, 52.7% were White, 5.0% were of other races and ethnicities, 22.4% were of unknown race and ethnicity. In-hospital mortality occurred in 10.9% of patients. After inverse probability treatment weighting, 28-day in-hospital mortality was significantly lower in those who received aspirin (10.2% vs 11.8%; odds ratio [OR], 0.85; 95% CI, 0.79-0.92; P < .001). The rate of pulmonary embolism, but not deep vein thrombosis, was also significantly lower in patients who received aspirin (1.0% vs 1.4%; OR, 0.71; 95% CI, 0.56-0.90; P = .004). Patients who received early aspirin did not have higher rates of gastrointestinal hemorrhage (0.8% aspirin vs 0.7% no aspirin; OR, 1.04; 95% CI, 0.82-1.33; P = .72), cerebral hemorrhage (0.6% aspirin vs 0.4% no aspirin; OR, 1.32; 95% CI, 0.92-1.88; P = .13), or blood transfusion (2.7% aspirin vs 2.3% no aspirin; OR, 1.14; 95% CI, 0.99-1.32; P = .06). The composite of hemorrhagic complications did not occur more often in those receiving aspirin (3.7% aspirin vs 3.2% no aspirin; OR, 1.13; 95% CI, 1.00-1.28; P = .054). Subgroups who appeared to benefit the most included patients older than 60 years (61-80 years: OR, 0.79; 95% CI, 0.72-0.87; P < .001; >80 years: OR, 0.79; 95% CI, 0.69-0.91; P < .001) and patients with comorbidities (1 comorbidity: 6.4% vs 9.2%; OR, 0.68; 95% CI, 0.55-0.83; P < .001; 2 comorbidities: 10.5% vs 12.8%; OR, 0.80; 95% CI, 0.69-0.93; P = .003; 3 comorbidities: 13.8% vs 17.0%, OR, 0.78; 95% CI, 0.68-0.89; P < .001; >3 comorbidities: 17.0% vs 21.6%; OR, 0.74; 95% CI, 0.66-0.84; P < .001).In this cohort study of US adults hospitalized with moderate COVID-19, early aspirin use was associated with lower odds of 28-day in-hospital mortality. A randomized clinical trial that includes diverse patients with moderate COVID-19 is warranted to adequately evaluate aspirin's efficacy in patients with high-risk conditions.