title: Reliability of Common Lower Extremity Biomechanical Measures of Children With and Without Obesity.
abstract: OBJECTIVE
  To determine intrarater and interrater reliability of common measures of lower extremity alignment among children with obesity.
  
  
  METHODS
  The Craig test for femoral anteversion, tibiofemoral angle, Foot Posture Index-6, and sit-and-reach test were performed on 25 children without obesity and 25 children with obesity.
  
  
  RESULTS
  Intrarater reliability of all measures in both groups was high. The Craig test demonstrated greatest variability with slight interrater reliability in children who were nonobese [intraclass correlation coefficient [ICC] (95% confidence interval [CI]), 0.372 (-0.051 to 0.6420)] and moderate reliability in children who were obese [ICC (95% CI), 0.527 (0.242 to 0.717)]. Interrater reliability for the tibiofemoral angle and Foot Posture Index-6 was moderate to substantial and for the sit-and-reach test was substantial (ICC >0.99) and highly correlated. Measurement of lower extremity alignment among children with obesity was more reproducible than among children who were not obese.
  
  
  CONCLUSIONS
  Measures of lower extremity alignment and general flexibility in children with obesity are both reproducible and reliable.
authors.affiliation: Department of Health Professions (Drs Tucker, Moore, Rooy, Wright, and Rothschild), Program in Physical Therapy, University of Central Florida, Orlando; Division of Pediatrics (Dr Werk), Nemours Children's Hospital, Orlando, Florida.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Tucker
authors.forename: Megan
authors.initials: M
authors.lastname: Moore
authors.forename: Julie
authors.initials: J
authors.lastname: Rooy
authors.forename: Amy
authors.initials: A
authors.lastname: Wright
authors.forename: Carey
authors.initials: C
authors.lastname: Rothschild
authors.forename: Lloyd N
authors.initials: LN
authors.lastname: Werk
mesh_terms: D001696:Biomechanical Phenomena; D015992:Body Mass Index; D002648:Child; D005260:Female; D006801:Humans; D035002:Lower Extremity / Q000503:physiopathology*; D008297:Male; D009765:Obesity / Q000503:physiopathology*; D015588:Observer Variation; D026741:Physical Therapy Modalities / Q000592:standards*; D015203:Reproducibility of Results