Nearly 2 million hospital stays involved malnutrition among adults and children in 2013, accounting for 4.5% of all inpatient stays.
Patients with malnutrition tended to be older (especially 85 years or older), Black, and from low-income and rural areas.
Other malnutrition-related stays were for weight loss or failure to thrive (21.6% of all malnutrition stays), cachexia (8.3%), underweight (4.4%), postsurgical nonabsorption (1.7%), and nutritional neglect (0.1%).
For more info, see Weiss et al. (2016). Characteristics of hospital stays involving malnutrition, 2013. Statistical Brief #210. Rockville, MD: Agency for Healthcare Research and Quality.