Original ResearchPublished 9 October 2026Low arterial oxygen-content burden during the first 24 h and hospital mortality in mechanically ventilated adults: analyses of MIMIC-IV and eICUXiaoyan Gao · Jiaqi Wang · Luyan Xiong · Bingzhu Hu · Cheng Jiang · Juan Li · Shi Chen · Cong ZhangFrontiers in Medicinedoi 10.3389/fmed.2026.1935082