Analysis of ESPEN and GLIM algorithms reveals specific drivers for the diagnosis of malnutrition in patients with chronic gastrointestinal diseases

•Analysis of different risk screening tools in combination with the European Society for Clinical Nutrition and Metabolism and Global Leadership Initiative on Malnutrition (GLIM) diagnostic algorithms in liver cirrhosis, short bowel syndrome, and chronic pancreatitis•Two- to three-fold higher prevalence of malnutrition in chronic gastrointestinal diseases with current GLIM compared with the European Society for Clinical Nutrition and Metabolism algorithm•Better performance of malnutrition risk screening tools (Malnutrition Universal Screening Tool and Royal Free Hospital Nutritional Prioritizing Tool) in conjunction with the GLIM algorithm than the Nutritional Risk Screening 2002•Identification of disease-specific drivers for malnutrition diagnosis among individual diagnostic criteria suggests different underlying mechanisms