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

Figure 4

Multivariate logistic regression models for studying the relationship between body mass index (BMI) and acute kidney injury (AKI) for different age groups of hospitalised patients (total number of patients under 55 years of age = 3960, where patients with AKI = 259; total number of patients aged 55–75 years = 4796, where patients with AKI = 681; total number of patients above 75 years old = 3799, where patients with AKI = 666). Note. BMI: body mass index; CI: confidence interval; OR: odds ratio. 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).