Association Between Blood Urea Nitrogen and Delirium in Critically Ill Elderly Patients Without Kidney Diseases: A Retrospective Study and Mendelian Randomization Analysis.

However, this association did not reach statistical significance in the adjusted models for non‐white ethnicity, sepsis (+), midazolam exposure (+), and mechanical ventilation (+) subgroups, where the 95% CI included 1. 3.6 Sensitivity Analysis In the PSM cohort, baseline characteristics between the high‐BUN and low‐BUN groups were largely similar, with no statistically significant differences identified, except for white blood cell levels (Table 4 ).

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