title: Bioelectrical impedance phase angle and subjective global assessment in detecting malnutrition among newly diagnosed head and neck cancer patients.
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. Phase angle, determined by bioelectrical impedance analysis, is proposed as an objective nutritional marker in various disease conditions. The study was conducted to investigate the association between phase angle and Subjective Global Assessment to validate the determination of the nutrition status in adult patients with head and neck cancer. In a prospective cohort study, patients were classified as either well-nourished or malnourished using the Subjective Global Assessment. Phase angle measured by bioelectrical impedance analysis was planned in 75 naive patients with histologically confirmed head and neck cancer. Receiver operating characteristic curves were estimated using the non-parametric method to determine the optimal cut-off level of phase angle. The study was conducted on a cohort population of 75 patients. Well-nourished patients (n = 45) had a statistically significantly higher (p = 0.005) median phase angle score (5.25º) as compared to those who were malnourished (4.73º) (n = 30). A phase angle cut-off of 4.73 was 80 % sensitive and 56.7 % specific in detecting malnutrition diagnosed by SGA in these populations. Phase angle is considered to be a nutritional indicator in patients with head and neck cancer in detecting malnutrition. Further observations are needed to calculate survival, and validate the prognostic significance of phase angle. For future studies, it is important to indicate the specificity of the PA in comparison to SGA measurement.
authors: Physiology Department, Medical University of Lublin, Radziwiłłowska 11 Str., 20-080, Lublin, Poland. tmalecka@gmail.com.
authors: Teresa
authors: T
authors: Małecka-Massalska
authors: Physiology Department, Medical University of Lublin, Radziwiłłowska 11 Str., 20-080, Lublin, Poland.
authors: Radoslaw
authors: R
authors: Mlak
authors: Epidemiology Department, Medical University of Lublin, Lublin, Poland.
authors: Agata
authors: A
authors: Smolen
authors: Otolaryngology Department, Head and Neck Oncology, Medical University of Lublin, Lublin, Poland.
authors: Kamal
authors: K
authors: Morshed
mesh_terms: D000328:Adult; D000368:Aged; D000886:Anthropometry / Q000379:methods*; D001823:Body Composition; D017097:Electric Impedance; D005260:Female; D006258:Head and Neck Neoplasms / Q000150:complications / Q000473:pathology; D006801:Humans; D008297:Male; D044342:Malnutrition / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D008875:Middle Aged; D015596:Nutrition Assessment; D009752:Nutritional Status; D011044:Poland; D015995:Prevalence; D011379:Prognosis; D011446:Prospective Studies; D012372:ROC Curve; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
keywords: Bioelectrical impedance analysis; Head and neck cancer; Phase angle; Subjective global assessment