title: Validation of two-dimensional kinematic analysis of walk and sit-to-stand motions in dogs.
abstract: OBJECTIVE
  To assess the intra- and interobserver repeatability of 2-dimensional (2-D) kinematic analysis of walk and sit-to-stand motions in dogs.
  
  
  METHODS
  10 healthy adult Labrador Retrievers.
  
  
  METHODS
  10 dogs were filmed during walk and sit-to-stand motions. Five trials were recorded for each dog, 3 of which were digitized. Two observers manually marked 15 landmarks on each frame during the motions of interest for these 3 trials. Each observer repeated the procedure approximately 1 week later. The 2-D joint angles were calculated. Intra- and interobserver coefficients of multiple correlations (CMCs) were calculated for each joint angle-time history.
  
  
  RESULTS
  Intraobserver repeatability, assessed as the mean CMCs of 12 joint angle measurements made for 10 dogs by 2 observers, was good or excellent in 23 of 24 (96%) mean CMCs of the joints measured. Interobserver variation, assessed by comparing CMCs of measurements made by 2 observers on 10 dogs on 2 days, was good or excellent in 161 of 240 (67%) CMCs of joints measured.
  
  
  CONCLUSIONS
  Intraobserver repeatability of 2-D kinematic measurements made on digitized videotapes was excellent. Interobserver repeatability of these measurements was acceptable.
authors.affiliation: Comparative Orthopedics Laboratory, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606.
authors.forename: Lauren C
authors.initials: LC
authors.lastname: Feeney
authors.forename: Cheng-Feng
authors.initials: CF
authors.lastname: Lin
authors.forename: Denis J
authors.initials: DJ
authors.lastname: Marcellin-Little
authors.forename: Amanda R
authors.initials: AR
authors.lastname: Tate
authors.forename: Robin M
authors.initials: RM
authors.lastname: Queen
authors.forename: Bing
authors.initials: B
authors.lastname: Yu
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D004285:Dogs / Q000502:physiology*; D005260:Female; D008297:Male; D015203:Reproducibility of Results; D016138:Walking / Q000502:physiology*