[Screening and diagnosis of undernutrition in adults in daily practice].

SCREENING AND DIAGNOSIS OF UNDERNUTRITION IN ADULTS IN DAILY PRACTICE Following an international expert consensus, the French National Authority for Health has revised the diagnostic criteria for undernutrition for adults -70 years (2019) and for adults 70 years (2021). The diagnosis of undernutrition is based on the combination of a phenotypic criterion and an etiological criterion. The phenotypic criteria as follows: weight loss, Body Mass Index (BMI) and criteria concerning muscle strength, muscle mass and physical performance. The aetiological criteria are three: decreased food intake, disturbed digestive absorption and acute or chronic pathologies leading to hypercatabolism. Hypoalbuminemia is no longer a diagnostic criterion for undernutrition, but it reflects its severity. Apart from BMI, these criteria also apply to obese people.