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| CHEN Shihai,LIU Wanyou,SHI Benlong.Reproducibility and reliability analysis for the three manual radiographic measurements of rotatory subluxation in scoliosis[J].Chinese Journal of Spine and Spinal Cord,2022,(7):605-609. |
| Reproducibility and reliability analysis for the three manual radiographic measurements of rotatory subluxation in scoliosis |
| Received:November 28, 2021 Revised:March 27, 2022 |
| English Keywords:Scoliosis Rotatory subluxation MB method EP method C method Reliability |
| Fund:江苏省自然科学基金青年基金（BK20170126）；南京市医学科技发展资金一般性课题（CZLB1480-202） |
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| English Abstract: |
| 【Abstract】 Objectives: To analyze the reproducibility and reliability of midbody(MB) method, endplate(EP) method and centroid(C) method in the measurements of rotatory subluxation(RS), and to investigate their respective influencing factors. Methods: 59 spinal deformity patients with RS treated with surgery in Drum Tower Hospital affiliated to Nanjing University Medical School from March 2012 to June 2020 were retrospectively reviewed. There were 15 cases of congenital scoliosis, 9 cases of idiopathic scoliosis, 16 cases of degenerative scoliosis and 19 cases of neuromyogenic scoliosis. There were 17 males and 42 females, and the average age was 34.0±18.8 years. Three spinal surgeons each performed the measurements using the three methods with a time interval of 2 weeks. Subsequently, the intraclass correlation coefficient(ICC) was applied for reliability analysis. Results: The average main curve Cobb angle was 64.2°±23.9° for the cohort. The RS levels were T4/5 in 1 patient (1.7%), T5/6 in 2(3.4%), T6/7 in 3(5.1%), T7/8 in 3(5.1%), T9/10 in 1(1.7%), T10/11 in 1(1.7%), T12/L1 in 6(10.2%), L1/2 in 5(8.5%), L2/3 in 9(15.3%), L3/4 in 16 (27.1%), and L4/5 in 12(20.3%). The RS values measured by MB, EP and C methods were respectively 16.5±7.1mm, 8.5±4.2mm, and 14.2±6.3mm. The intra-observer reliabilities were 0.77-0.91 for MB method, 0.78-0.81 for EP method and 0.82-0.94 for C method, while the inter-observer reliabilities were 0.87 for MB method, 0.90 for EP method and 0.86 for C method. Conclusions: The MB method, EP method and C method had high reproducibility and reliability in the measurement of RS, among which C method showed the best intra-observer reliability and EP method showed the best inter-observer reliability. |
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