OBJECTIVE: The purpose of this study was to evaluate the inter- and intraobserver variability in measuring the tibio-femoral angle using our new computer-assisted method, and to compare it with a conventional manual method. METHODS: Radiography of all patients of osteoarthritis of the knee in outpatient were performed with standing on both legs, and with conventional antero-posterior weight bearing view of the knee fully extended. Three examiners measured the tibio-femoral angle with the computerized method in 52 subjects with osteoarthritis (73 knees). The tibio-femoral angle was measured using a computer-assisted method in which the observer must visually determine and select eight points on the margins of the femur and tibia on a radiographic image displayed on a computer monitor. The inter- and intraobserver Intra-class correlation (ICC) was analyzed. RESULTS: The interobserver mean correlation of computer-assisted method was 0.970 with a mean difference of 0.38 degrees (S.D. 1.125 degrees). The intraobserver mean ICC of computer-assisted method was 0.973, with a mean difference of 0.16 degrees (S.D. 1.12 degrees). An analysis of the difference between conventional methods and our new system showed a mean ICC of 0.922, with an intersystem mean difference of 0.295 degrees (S.D. 1.82 degrees). CONCLUSION: Our computer-assisted method of measuring the tibio-femoral angle was simple, easy, and quick, and should be considered as an alternate method for measurement.
OBJECTIVE: The purpose of this study was to evaluate the inter- and intraobserver variability in measuring the tibio-femoral angle using our new computer-assisted method, and to compare it with a conventional manual method. METHODS: Radiography of all patients of osteoarthritis of the knee in outpatient were performed with standing on both legs, and with conventional antero-posterior weight bearing view of the knee fully extended. Three examiners measured the tibio-femoral angle with the computerized method in 52 subjects with osteoarthritis (73 knees). The tibio-femoral angle was measured using a computer-assisted method in which the observer must visually determine and select eight points on the margins of the femur and tibia on a radiographic image displayed on a computer monitor. The inter- and intraobserver Intra-class correlation (ICC) was analyzed. RESULTS: The interobserver mean correlation of computer-assisted method was 0.970 with a mean difference of 0.38 degrees (S.D. 1.125 degrees). The intraobserver mean ICC of computer-assisted method was 0.973, with a mean difference of 0.16 degrees (S.D. 1.12 degrees). An analysis of the difference between conventional methods and our new system showed a mean ICC of 0.922, with an intersystem mean difference of 0.295 degrees (S.D. 1.82 degrees). CONCLUSION: Our computer-assisted method of measuring the tibio-femoral angle was simple, easy, and quick, and should be considered as an alternate method for measurement.
Authors: Y Akamatsu; H Kobayashi; Y Kusayama; M Aratake; K Kumagai; T Saito Journal: Knee Surg Sports Traumatol Arthrosc Date: 2015-11-14 Impact factor: 4.342
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Authors: R G Marx; P Grimm; K A Lillemoe; C M Robertson; O R Ayeni; S Lyman; E A Bogner; H Pavlov Journal: Knee Surg Sports Traumatol Arthrosc Date: 2011-03-23 Impact factor: 4.342
Authors: Y Akamatsu; N Mitsugi; Y Mochida; N Taki; H Kobayashi; R Takeuchi; T Saito Journal: Knee Surg Sports Traumatol Arthrosc Date: 2011-07-29 Impact factor: 4.342
Authors: Elizabeth A Sled; Lisa M Sheehy; David T Felson; Patrick A Costigan; Miu Lam; T Derek V Cooke Journal: Rheumatol Int Date: 2009-11-01 Impact factor: 2.631
Authors: Nikita Lakomkin; Peter D Fabricant; Aristides I Cruz; Christopher M Brusalis; Nancy A Chauvin; J Todd R Lawrence Journal: JB JS Open Access Date: 2016-12-30