@article{ajcmr2014232,
author={{Imai, Norio and Miyasaka, Dai and Horigome, Yoji and Suzuki, Hayato and Takubo, Ryota and Endo, Naoto},
title={Are Measurements of Sacral Slopes Reliable?},
journal={American Journal of Clinical Medicine Research},
volume={2},
number={3},
pages={57--60},
year={2014},
url={http://pubs.sciepub.com/ajcmr/2/3/2},
issn={2328-403X},
abstract={<b>Background:</b> Malpositioning during total hip arthroplasty may cause dislocation, pain, and other complications. To evaluate the potential of sacral slope (SS) as a reliable parameter of pelvic flexion. <b>Methods:</b> We developed a model of pelvic flexion to determine the intraobserver and interobserver variability and reliability of SS measurements by lateral radiography by three independent observers. <b>Results:</b> Measurement error was 1.2 and the intraobserver reliability was moderate to substantial (Interclass correlation coefficient: 0.31 to 0.66). Based on the Spearman-Brown formula, the measurement is reliable if it is done at least seven times by two observers, and four times by three observers. <b>Conclusions:</b> The data suggest that measurement of SS of pelvic flexion is a clinically useful parameter for the optimization of THA conditions.},
doi={10.12691/ajcmr-2-3-2}
publisher={Science and Education Publishing}
}