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Which of the following are characteristics used to diagnose malnutrition in the elderly?

According to a study cited by Harvard Health Publishing, about one in four adults aged 65 and older in the U.S. are either malnourished or at risk. Given this prevalence, understanding **which of the following are characteristics used to diagnose malnutrition in the elderly** is crucial for ensuring proper identification and intervention. Diagnostic criteria often include unintentional weight loss, reduced body mass index (BMI), and loss of muscle mass, assessed using validated tools.