Abstract Objective To investigate the effects of osteoporosis on the sagittal spinepelvic parameters in elderly patients.Methods 115 patients with osteoporosis received from the osteoporosis specialist outpatient clinic of Department of Orthopedics in Union Hospital of Tongji Medical College from June 2020 to June 2021 were selected as the observation group.21 males and 94 females were included.The age ranged form 58 to 79,with an average age of (67.76±9.17)years.60 patients without osteoporosis who came to our hospital for health examination during the same period were selected as the control group including 18 males and 42 females.The age ranged form 54 to 76,with an average age of (65.25±10.38)years.Low-radiation X-ray machine was used to take lateral X-rays of the spine including the hip joint in the standing position to assess the spine-pelvic sagittal morphology.Thoracic kyphosis(TK),lumbar lordosis(LL),pelvic incidence(PI),pelvic tilt(PT),sacral slope(SS)and the sagittal vertical axis(SVA)were measured.The intraclass correlation coefficient(ICC)was used to evaluate the reliability of the intraobserver and interobserver.The spinepelvic sagittal parameters of the two groups were compared to analyze the effects of osteoporosis on the sagittal spine-pelvis parameters in elderly patients.Results The intra-observer and inter-observer ICC were 0.90~0.95.There were significant differences between the observation group and the control group in SVA,SS,PT,LL and TK (P<0.05).PI of the observation group was not statistically different from that of the control group(P>0.05).Conclusion The sagittal spinopelvic parameters in elderly patients change mainly in SVA,SS,PT,LL and TK after osteoporosis,while the PI is relatively constant.
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