Low, rather than High, Body Mass Index Is a Risk Factor for Acute Kidney Injury in Multiethnic Asian Patients: A Retrospective Observational Study

Figure 6

The nonlinear relation between continuous BMI and the probability of having AKI between different age groups by restricted cubic spline regression (total number of patients = 12,555; patients with acute kidney injury = 1606; patients with no acute kidney injury = 10,949). Note. BMI: body mass index; 95% confidence intervals (CIs) are denoted by a grey shadow. Adjusted variables in logistic regression models include age, gender, ethnicity, background diagnoses (cardiovascular disease, chronic kidney disease, diabetes mellitus, hepatobiliary disease, psychiatric illness, and gastrointestinal disease), primary diagnoses (infectious and parasitic diseases, neoplasm, diseases of the genitourinary system, diseases of the musculoskeletal system and connective tissue, and symptoms, signs, and ill-defined conditions), and procedures (otolaryngology related surgery, endoscopy, open laparotomy, and cardiology related percutaneous procedures).