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| HU Jun,QIAN Bangping,QIU Yong.Feasibility of using sacro-femoral-pubic angle to estimate pelvic tilt[J].Chinese Journal of Spine and Spinal Cord,2013,(12):1068-1073. |
| Feasibility of using sacro-femoral-pubic angle to estimate pelvic tilt |
| Received:January 05, 2013 Revised:February 06, 2013 |
| English Keywords:Spine Sagittal Pelvic parameter Pelvic tilt |
| Fund:江苏省自然科学基金（编号：BK 2011092）；南京市卫生局重点项目（编号：YYK05096）；江苏省重点项目（编号：BJ98025） |
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| English Abstract: |
| 【Abstract】 Objectives: To investigate the reliability of sacro-femoral-pubic angle(SFP) in estimating pelvic tilt(PT) in adults of Chinese Han nationality. Methods: Thirty-seven normal adults of Chinese Han nationality(21 females and 16 males) with a mean age of 32.6 years (range, 18-55 years) were included in this study. Subjects were divided into group A(16 males) and group B(21 females). Full-length antero-posterior and lateral spine radiographs were available and all spinal and pelvic anatomic landmarks(pelvis and femoral heads) were identified. PT, SFP, and sacral slope(SS) were calculated by validated digital analysis software(Image-Pro Plus 6.0). The correlation between SFP angle and pelvic tilt was evaluated by Pearson coefficient, followed by the linear regression analysis between SFP and PT. Results: The average SFP, PT, and SS was 69.6°±5.5° (range, 57.8°-77.2°), 9.8°±5.5°(range, 2.3°-22.6°), and 31.1°±10.1°(range, 22.1°-46.7°), respectively. Significant correlation between SFP and PT was observed and the Pearson′s correlation coefficient was 0.824(P<0.001). According to the linear regression analysis, PT could be estimated by the formula: PT=78-SFP, and in the range of ±4.5°, the predictive potential of the formula was 78.4%. The correlation and predictive potential of group A was better than that of group B(group A: r=0.856 and predictive potential=81.3%; group B: r=0.738 and predictive potential=76.2%). Conclusions: By the above mentioned formula, the PT value in the sagittal plane can be calculated based on the SFP value when it is difficult to be accurately measured due to the poor visualization of the femur heads in adults of Chinese Han nationality. |
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