Statistical analyses
death, ischemic heart disease, chronic pulmonary disease, diabetes, Death, active cancer
EVENTS, HYPERTENSION, COMPLICATIONS, DIABETES
We used a minimization method for randomization. The stratification factors were (1) sex; (2) age less than 70 years; and, (3) one or more of the complications hypertension, diabetes, ischemic heart disease, chronic pulmonary disease, and active cancer. In this study, central randomization was used for allocation concealment.Death was compared between groups using the Cox proportional hazard model. Sub-hazard ratios (SHRs) were calculated for intubation and admission to ICU using Fine and Gray’s method [Considering that death was a competing risk, graphs were plotted using the cumulative incidence function with competing events for the analyses of time to oxygen termination and time to discharge. The Pepe and Mori test was used to compare groups [