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Reliability of Computer‐Assisted and Manual Measurement Methods for Assessment of Graf Type 1 and Type 2 Hip Sonograms
Author(s) -
Bilgili Fuat,
Bilgili Çiğdem Özkara,
Çetinkaya Engin,
Polat Abdulkadir,
Sungur İbrahim,
Saglam Yavuz,
Kasali Kamber,
Parmaksızoğlu Atilla Sancar
Publication year - 2016
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/ultra.15.03022
Subject(s) - concordance , medicine , reliability (semiconductor) , nuclear medicine , medical physics , power (physics) , physics , quantum mechanics
Objectives The purpose of this study was to investigate the interobserver, intraobserver, and intermethod reliability of computer‐assisted digital and manual measurements of hip sonograms. Methods Seventy‐four hip sonograms were evaluated in this retrospective study. Five evaluators measured digital images and manual paper printouts according to the Graf method (Arch Orthop Trauma Surg 1984; 102:248–255) . Interobserver and intraobserver reliability rates were calculated. Reliability criteria were graded on a numeric scale. Results The interobserver reliability of both computer‐based and manual methods for alpha angle measurements was good to excellent, but the interobserver reliability was fair to poor for beta angle measurements. Intraobserver reliability was varied. Alpha angle measurements by both manual and computer‐based methods had high concordance with each other, whereas beta angle measurements had low concordance. The intermethod variability did not differ between observers. Conclusions The alpha angle measurements had high concordance with each other for both manual and computer‐based methods, whereas the beta angle measurements had low concordance. This information should be taken into account in clinical practice. Overall, the two measurement methods were reliable and consistent with each other.