A non-linear relationship between ADG and pneumonia mortality at both 30-day and 90-day endpoints was observed after adjustment for potential confounders (age, etiology, other immunosuppressants use, neutrophils, COPD, CTD, ALT, BUN, CVVH, respiratory failure, and solid organ transplantation), as illustrated in Figures 2A, B. Here, GPT is linked to chronic obstructive pulmonary disease.