Reliability of a technique for determining sagittal knee geometry from lateral knee radiographs

The Knee
John W ChowMark D Tillman

Abstract

The purposes of this study were to describe an analytical technique for determining selected 2-dimensional geometric characteristics of a knee joint using lateral knee radiographs and to examine the inter- and intra-analyst reliability of this technique. Five lateral knee radiographs of different knee flexion angles (25-85 degrees at intervals of 15 degrees ) were obtained from five subjects. Two graduate and five undergraduate students with knowledge of knee anatomy served as the analysts and were asked to identify certain landmarks from the radiographs. The coordinates of these landmarks were used to determine the effective moment arm of the quadriceps force, patellar tendon length, patella height, patellar mechanism and patellar tendon angles, and tibiofemoral and patellofemoral joint spaces. For each radiograph, intraclass correlation coefficients (ICCs) were computed for combinations of 2-7 analysts. Using all seven analysts, the ICCs ranged from 0.9967 to 0.9985 for different radiographs. When fewer analysts were used, the average ICCs were 0.9975 (6 analysts), 0.9974 (5 analysts), 0.9974 (4 analysts), 0.9974 (3 analysts), and 0.9973 (2 analysts). Four of the analysts re-analyzed the radiographs 2-3months after the initia...Continue Reading

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Citations

Jan 7, 2009·European Journal of Applied Physiology·Dimitrios E TsaopoulosConstantinos N Maganaris
Jan 5, 2010·Journal of Biomechanics·Thomas D O'BrienConstantinos N Maganaris
Jul 4, 2007·Journal of Biomechanics·Dimitrios E TsaopoulosConstantinos N Maganaris
Jun 6, 2009·Journal of Anatomy·Thomas D O'BrienConstantinos N Maganaris
Mar 13, 2014·Journal of Biomechanics·Robert M ErskineGladys L Onambele-Pearson

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