The cohort study was conducted to examine the incidence of barotrauma and its outcome in critically ill patients admitted to the intensive care unit (ICU) with Covid-19 in Los Angeles, from 03/15/20 to 06/20/20. (reference: Kahn et al., 2021 under the Supplemental Materials). Based on the data below (also shown in Figure 1 of the article), what is the relative risk for death for those with barotrauma as compared to those without barotrauma?