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. 2022 Nov 19;14(22):4906. doi: 10.3390/nu14224906

Table 1.

Diagnostic criteria for undernutrition by the European Society for Clinical Nutrition and Metabolism.

Undernutrition Criteria 1 Undernutrition Criteria 2
BMI < 18.5 kg/m2 Unintentional weight loss of 5% within 3 months or 10% within 12 months combined with either
  • (1)

    BMI < 20 kg/m2 if <70 years of age or BMI < 22 kg/m2 if ≥70 years

  • (2)

    FFMI defined as <15 kg/m2 in females and <17 kg/m2 in males