title: Study design and baseline description of the BMI2 trial: reducing paediatric obesity in primary care practices.
abstract: OBJECTIVE
  This study will test the efficacy of motivational interviewing (MI) conducted by primary care providers and dieticians among children ages 2-8 years old with a body mass index (BMI) ≥ 85th and ≤ 97th percentile.
  
  
  METHODS
  Forty-two practices from the American Academy of Pediatrics, Pediatric Research in Office Settings Network were assigned to one of three groups. Group 1 (usual care) measures BMI percentile at baseline, and at 1- and 2-year follow-ups and receives standard health education materials. Group 2 providers deliver three proactive MI counselling sessions with a parent of the index child in Year 1 and one additional 'booster' visit in Year 2. Group 3 adds six MI counselling sessions from a trained dietician. The primary outcome is the child's BMI percentile at 2-year follow-up. Secondary outcomes include parent report of the child's screen time, physical activity, intake of fruits and vegetables, and sugar-sweetened beverages.
  
  
  RESULTS
  We enrolled 633 eligible children whose mean BMI percentile was 92.0 and mean age of 5.1. The cohort was 57% female. Almost 70% of parents reported a household income of ≥ $40,000 per year, and 39% had at least a college education. The cohort was 63% white, 23% Hispanic, 7% black and 7% Asian. Parent self-reported confidence that their child will achieve a healthy weight was on average an 8 (out of 10).
  
  
  CONCLUSIONS
  To date, several aspects of the study can inform similar efforts including our ability to use volunteer clinicians to recruit participants and their willingness to dedicate their time, without pay, to receive training in MI.
authors.affiliation: Department of Health Behavior & Health Education, University of Michigan, Ann Arbor, MI 48109-2029, USA. kresnic@umich.edu
authors.forename: K
authors.initials: K
authors.lastname: Resnicow
authors.forename: F
authors.initials: F
authors.lastname: McMaster
authors.forename: S
authors.initials: S
authors.lastname: Woolford
authors.forename: E
authors.initials: E
authors.lastname: Slora
authors.forename: A
authors.initials: A
authors.lastname: Bocian
authors.forename: D
authors.initials: D
authors.lastname: Harris
authors.forename: J
authors.initials: J
authors.lastname: Drehmer
authors.forename: R
authors.initials: R
authors.lastname: Wasserman
authors.forename: R
authors.initials: R
authors.lastname: Schwartz
authors.forename: E
authors.initials: E
authors.lastname: Myers
authors.forename: J
authors.initials: J
authors.lastname: Foster
authors.forename: L
authors.initials: L
authors.lastname: Snetselaar
authors.forename: D
authors.initials: D
authors.lastname: Hollinger
authors.forename: K
authors.initials: K
authors.lastname: Smith
mesh_terms: D015992:Body Mass Index; D002648:Child; D002675:Child, Preschool; D016000:Cluster Analysis; D004046:Dietetics / Q000379:methods*; D005260:Female; D006801:Humans; D007406:Interview, Psychological; D008297:Male; D009042:Motivation; D050177:Overweight / Q000523:psychology*; D011320:Primary Health Care / Q000379:methods*; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D015431:Weight Loss