Retrospective 1,033 critical condition patients, showing lower in-hospital mortality with aspirin in PSM analysis. Patients receiving aspirin also had a higher risk of significant bleeding, although not reaching statistical significance. Authors note that the use of aspirin during an ICU stay should be tailored to each patient.
Al Harthi et al., 9/3/2021, retrospective, propensity score matching, Saudi Arabia, Middle East, preprint, 20 authors.
risk of death, 27.0% lower, RR 0.73, p = 0.03, treatment 98 of 176 (55.7%), control 107 of 173 (61.8%), adjusted per study, in-hospital mortality, multivariable Cox proportional hazards.
risk of death, 14.0% lower, RR 0.86, p = 0.30, treatment 95 of 176 (54.0%), control 97 of 175 (55.4%), adjusted per study, day 30, multivariable Cox proportional hazards.
Effect extraction follows pre-specified rules
prioritizing more serious outcomes. For an individual study the most serious
outcome may have a smaller number of events and lower statistical signficance,
however this provides the strongest evidence for the most serious outcomes
when combining the results of many trials.