Sofie D Egsgaard, Eeva-Liisa Røssell, Jes B Sørensen, Henrik Støvring
Women's health literacy and attendance in breast cancer screening: a Danish population-based study combining survey and register data
Scandinavian journal of public health
mechanismbased reasoning retrospective cohort study establish quantitative relationship change clivoaxial angle cxa change subaxial cervical lordosis cl correction surgery atlantoaxial dislocation aad evolving understanding mechanism dramatically improved treatment modality aad cervical sagittal alignment another important aspect surgery addition reduction odontoid process however quantitative reference correction surgery established frankfortaxial angle fxa introduced based two assumptions 1 sagittal alignment spine aims keeping horizontal gaze 2 deformities craniovertebral junction make little impact slope t1 vertebra deduced change cxa equaled change cl cxa cl retrospectively reviewed case cohort validate finding linear regression analysis sixteen cases eight male eight female mean age 404125 yr old included liner fitting equation fxa cxa y1005x coefficient determination r0966 significance estimated coefficients p0001 tstatistics cl cxa y1023x r0976 p0001 results support deduction cxa cl used guidance quantitative correction sagittal deformity aad correction cxa influence subaxial cervical lordosis cxa cl aad patients equation serve quantitative reference preoperative planning intraoperative refining correction cervical sagittal deformity aad 4