title: Usefulness of cross-table lateral view radiograph for the diagnosis of cam-type femoroacetabular impingement.
abstract: The purpose of this study was to examine the usefulness of cross-table view in the clinical diagnosis of cam-type femoroacetabular impingement (FAI). We measured the α angles on radiographs taken in cross-table lateral view in 39 hips with cam-type FAI and compared with those measured in 45 control hips. Alpha angles ranged from 30° to 78° (mean 56°) in the control group and from 47° to 120° (mean 81.1°) in the FAI group. From a canonial discriminant analysis, the cutoff value of α angle was 68.2°. Sensitivity analysis showed a sensitivity of 87.18 %, specificity of 88.89 %, and accuracy of 88.3 %. Cross-table lateral view is useful for the diagnosis of cam-type FAI.
authors.affiliation: Department of Physical Therapy, Health Science University, 7187 Kodachi, Fujikawaguchiko, Yamanashi, 401-0380, Japan, yasuhiro_yamamoto@kenkoudai.ac.jp.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Yoshimitsu
authors.initials: Y
authors.lastname: Hiejima
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019540:Area Under Curve; D001182:Arthroscopy; D016022:Case-Control Studies; D016002:Discriminant Analysis; D005260:Female; D057925:Femoracetabular Impingement / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012372:ROC Curve; D011859:Radiography / Q000379:methods; D055815:Young Adult