Mixed

Diagnosing malnutrition requires the concurrent presence of at least one phenotypic criterion (weight loss, low BMI, or reduced muscle mass) and one etiologic criterion (reduced food intake/assimilation or disease burden/inflammation).

To diagnose malnutrition in a clinical setting, you must find evidence of physical changes (like weight loss, low BMI, or muscle loss) AND evidence of a cause (like reduced food intake or active inflammation). Neither alone is sufficient for a diagnosis.