FIGURE 4.

(A, B) Restricted cubic spline curve for the serum magnesium odds ratio (OR) for 28‐day mortality. Association of serum magnesium and 28‐day mortality among US (A) and Chinese (B) patients with sepsis. Institutional cohorts adjusted for age, gender, ethnicity, body mass index (BMI), laboratory tests (white blood cell count, hemoglobin, platelets, serum creatinine, international normalized ratio, serum potassium, and total bilirubin), and comorbidities (hypertension, liver disease, renal failure, diabetes, malignant cancer, chronic pulmonary disease, and cerebrovascular disease). Medical Information Mart for Intensive Care‐IV (MIMIC‐IV) cohort lacked BMI and total bilirubin, while other confounders were the same as the institutional cohort. CI, confidence interval.