title: Intra- and inter-rater reliability of the anterior atlantodental interval measurement from conventional lateral view flexion/extension radiographs.
abstract: An investigation of intra- and inter-rater reliability anterior atlantodental interval (AADI) measurements was conducted using flexion/extension plain radiographs. Flexion and extension lateral radiographs of individuals investigated for atlantoaxial instability were measured for AADI on three occasions. Intra-rater intraclass correlation coefficients (ICC) were calculated for both flexion (0.99) and extension (0.96). Inter-rater ICCs were 0.93 and 0.84 for flexion and extension, respectively. The AADI measurement proved to be reproducible with a minimal standard of error, between and within raters.
authors.affiliation: Faculty of Kinesiology, University of Calgary, 19 Discovery Valley Cove SW, Calgary, Alb., Canada T3H 5H3. westaway@telusplanet.net
authors.forename: Michael D
authors.initials: MD
authors.lastname: Westaway
authors.forename: William Y
authors.initials: WY
authors.lastname: Hu
authors.forename: Paul W
authors.initials: PW
authors.lastname: Stratford
authors.forename: Murray E
authors.initials: ME
authors.lastname: Maitland
mesh_terms: D000293:Adolescent; D000328:Adult; D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging*; D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D015203:Reproducibility of Results; D012189:Retrospective Studies