title: Edmonton Obesity Staging System Prevalence and Association with Weight Loss in a Publicly Funded Referral-Based Obesity Clinic.
abstract: OBJECTIVE
  To determine the distribution of EOSS stages and differences in weight loss achieved according to EOSS stage, in patients attending a referral-based publically funded multisite weight management clinic.
  
  
  METHODS
  5,787 obese patients were categorized using EOSS staging using metabolic risk factors, medication use, and severity of doctor diagnosis of obesity-related physiological, functional, and psychological comorbidities from electronic patient files.
  
  
  RESULTS
  The prevalence of EOSS stages 0 (no risk factors or comorbidities), 1 (mild conditions), 2 (moderate conditions), and 3 (severe conditions) was 1.7%, 10.4%, 84.0%, and 3.9%, respectively. Prehypertension (63%), hypertension (76%), and knee replacement (33%) were the most common obesity-related comorbidities for stages 1, 2, and 3, respectively. In the models including age, sex, initial BMI, EOSS stage, and treatment time, lower EOSS stage and longer treatment times were independently associated with greater absolute (kg) and percentage of weight loss relative to initial body weight (P < 0.05).
  
  
  CONCLUSIONS
  Patients attending this publicly funded, referral-based weight management clinic were more likely to be classified in the higher stages of EOSS. Patients in higher EOSS stages required longer treatment times to achieve similar weight outcomes as those in lower EOSS stages.
authors.affiliation: School of Kinesiology & Health Science, York University, Toronto, ON, Canada M3J 1P3.
authors.forename: Karissa L
authors.initials: KL
authors.lastname: Canning
authors.affiliation: School of Kinesiology & Health Science, York University, Toronto, ON, Canada M3J 1P3.
authors.forename: Ruth E
authors.initials: RE
authors.lastname: Brown
authors.affiliation: The Wharton Medical Clinic, Hamilton, ON, Canada L8L 5G8.
authors.forename: Sean
authors.initials: S
authors.lastname: Wharton
authors.affiliation: Department of Medicine, University of Alberta, Edmonton, Canada T6G 2G3.
authors.forename: Arya M
authors.initials: AM
authors.lastname: Sharma
authors.affiliation: School of Kinesiology & Health Science, York University, Toronto, ON, Canada M3J 1P3.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Kuk
mesh_terms: D000328:Adult; D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data*; D002170:Canada / Q000453:epidemiology; D015897:Comorbidity; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology / Q000517:prevention & control*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology / Q000517:prevention & control*; D008297:Male; D009765:Obesity / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy*; D015995:Prevalence; D012017:Referral and Consultation / Q000706:statistics & numerical data*; D012307:Risk Factors; D015431:Weight Loss; D061217:Weight Reduction Programs