The association of weight loss with one-year mortality in hospital patients, stratified by BMI and FFMI subgroups.

Background: The European Society for Clinical Nutrition and Metabolism (ESPEN) has recently published consensus-based criteria for the diagnosis of malnutrition; in subjects identified at nutritional risk the diagnosis is confirmed by either BMI <18.5 kg/m or weight loss in combination with low BMI or low FFMI. Concerns have been raised whether this definition correctly classifies malnutrition in patients with normal weight or overweight and concomitant weight loss.