title: Predictors of weight loss during radiation therapy.
abstract: OBJECTIVE
  To define risk factors for weight loss or dehydration during radiation therapy (RT).
  
  
  METHODS
  Retrospective chart review, academic tertiary care center.
  
  
  RESULTS
  The incidence of severe weight loss during RT was 32.7%, the incidence of dehydration was 10.9%, and the rate of prophylactic feeding gastrostomy tube placement was 32%. The patients most likely to suffer severe weight loss included patients with tumor sites of nasopharynx and base of tongue, those treated with chemoradiation, and patients with severe pretreatment weight loss. Prophylactic feeding gastrostomy tube placement before RT significantly reduced the incidence of severe weight loss and hospitalization during RT.
  
  
  CONCLUSIONS
  Severe weight loss and dehydration during RT for head and neck cancer is common. Prophylactic feeding gastrostomy tubes significantly reduce the incidence of severe weight loss and hospitalization for dehydration during RT when placed before onset of RT. Patients at risk for severe weight loss include those with severe pretreatment weight loss, tumors of the nasopharynx and base of tongue, or treatment with chemoradiation.
authors.affiliation: Texas Voice Center, TX, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Beaver
authors.forename: K E
authors.initials: KE
authors.lastname: Matheny
authors.forename: D B
authors.initials: DB
authors.lastname: Roberts
authors.forename: J N
authors.initials: JN
authors.lastname: Myers
mesh_terms: D003681:Dehydration / Q000145:classification / Q000453:epidemiology / Q000209:etiology* / Q000628:therapy; D004750:Enteral Nutrition / Q000706:statistics & numerical data; D005260:Female; D005774:Gastrostomy / Q000706:statistics & numerical data; D005931:Glottis; D006258:Head and Neck Neoplasms / Q000532:radiotherapy*; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D007013:Hypopharynx; D015994:Incidence; D007822:Laryngeal Neoplasms / Q000532:radiotherapy*; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000532:radiotherapy*; D009960:Oropharynx; D018579:Patient Selection; D010610:Pharyngeal Neoplasms / Q000532:radiotherapy*; D011237:Predictive Value of Tests; D011878:Radiotherapy / Q000009:adverse effects*; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D015431:Weight Loss