title: Monitoring nutritional status accurately and reliably in adolescents with anorexia nervosa.
abstract: OBJECTIVE
  Accurate assessment of nutritional status is a vital aspect of caring for individuals with anorexia nervosa (AN) and body mass index (BMI) is considered an appropriate and easy to use tool. Because of the intense fear of weight gain, some individuals may attempt to mislead the physician. Mid-upper arm circumference (MUAC) is a simple, objective method of assessing nutritional status. The setting is an eating disorders clinic in a tertiary paediatric hospital in Western Australia. The aim of this study is to evaluate how well MUAC correlates with BMI in adolescents with AN.
  
  
  METHODS
  Prospective observational study to evaluate nutritional status in adolescents with AN.
  
  
  RESULTS
  Fifty-five adolescents aged 12-17 years with AN were assessed between January 1, 2004 and January 1, 2006. MUAC was highly correlated with BMI (r = 0.79, P < 0.001) and individuals with MUAC >or=20 cm rarely required hospitalisation (negative predictive value 93%).
  
  
  CONCLUSIONS
  MUAC reflects nutritional status as defined by BMI in adolescents with AN. Lack of consistency between longitudinal measurements of BMI and MUAC should be viewed suspiciously and prompt a more detailed nutritional assessment.
authors.affiliation: Eating Disorders Program, Princess Margaret Hospital for Children, Western Australia, Australia. andrew.martin@health.wa.gov.au
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Martin
authors.forename: Elaine M
authors.initials: EM
authors.lastname: Pascoe
authors.forename: David A
authors.initials: DA
authors.lastname: Forbes
mesh_terms: D000293:Adolescent; D000856:Anorexia Nervosa / Q000175:diagnosis* / Q000378:metabolism / Q000523:psychology; D000886:Anthropometry / Q000379:methods*; D001132:Arm / Q000033:anatomy & histology; D015992:Body Mass Index; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D044342:Malnutrition / Q000175:diagnosis* / Q000209:etiology / Q000378:metabolism; D015596:Nutrition Assessment; D009752:Nutritional Status / Q000502:physiology*; D019370:Observation; D011446:Prospective Studies