Association of preoperative albumin-corrected anion gap with 28-day mortality in cardiac surgery patients: a retrospective cohort study.

Regarding other clinical strata (such as age, gender, and baseline comorbidities), exploratory Subgroup analysis indicated that elevated ACAG levels showed a trend of being associated with a higher risk of death in most clinical subgroups, with particularly pronounced effects observed in younger patients (≤ 60 years), individuals with higher BMI (≥ 25), males, and patients without specific comorbidities such as AKI, CKD, HF, MI, or COPD.

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