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Abstract

Malnutrition, which can be determined by subjective and objective methods, has a high prevalence in head and neck cancer patients. Subjective Global Assessment is a subjective method of nutritional status evaluation. There are several parameters as phase angle (Ph), extracellular mass/body cell mass ratio (ECM/BCM) or fat free mass index (FFMI) determined by bioelectrical impedance analysis, which can be proposed as an objective nutritional marker in various disease conditions. Ph is considered to be a global marker of health. The biological meaning of Ph is not well understood. It reflects body cell mass and is one of the best markers of cell membrane function. Decreased cell integrity or cell death is marked by lower Ph, while large quantities of intact cell membranes are marked by higher Ph. The FFMI is the FFM (kg) divided by height (m) squared (kg/m2). FFMI has been proposed as a potentially useful in evaluating body composition parameter eliminating differences in fat free mass associated with height. The ECM/BCM ratio describes the nutritional status. A rising ECM/BCM ratio is an early warning sign of a worsening nutritional status.The speech will cover the characteristic of the objective tools of malnutrition assessment.Receiver Operating Characteristic curves will be presented estimated using the non-parametric method to determine the optimal cut-offlevel of the phase angle, fat-free mass index and extracellular mass/body cell mass ratio in head and neck cancer patients in malnutrition assessment. Phase angle, fat-free mass index and extracellular mass/body cell mass ratio are considered to be nutritional indicators in patients with head and neck cancer in detecting malnutrition.

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