Reliability of Computer-Assisted and Manual Measurement Methods for Assessment of Graf Type 1 and Type 2 Hip Sonograms.
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.
['Bilgili|Fuat|F|', 'Bilgili|Çiğdem Özkara|ÇÖ|', 'Çetinkaya|Engin|E|', 'Polat|Abdulkadir|A|', 'Sungur|İbrahim|İ|', 'Saglam|Yavuz|Y|', 'Kasali|Kamber|K|', 'Parmaksızoğlu|Atilla Sancar|AS|']
D005260:Female D006618:Hip Dislocation, Congenital D006621:Hip Joint D006801:Humans D007091:Image Processing, Computer-Assisted D007223:Infant D007231:Infant, Newborn D008297:Male D015588:Observer Variation D015203:Reproducibility of Results D012189:Retrospective Studies D014463:Ultrasonography
manual measurement intraobserver reliability interobserver reliability hip sonography machine-based measurement musculoskeletal ultrasound