Relative lumbar lordosis and lordosis distribution index: individualized pelvic incidence-based proportional parameters that quantify lumbar lordosis more precisely than the concept of pelvic incidence minus lumbar lordosis


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YILGÖR İ. Ç. , Sogunmez N., YAVUZ Y., Abul K., Boissiere L., Haddad S., ...More

NEUROSURGICAL FOCUS, vol.43, no.6, 2017 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 6
  • Publication Date: 2017
  • Doi Number: 10.3171/2017.8.focus17498
  • Title of Journal : NEUROSURGICAL FOCUS
  • Keywords: adult spinal deformity, mechanical complication, spinopelvic mismatch, individualized analysis, compensatory mechanisms, distribution of lordosis, ADULT SPINAL DEFORMITY, SAGITTAL ALIGNMENT, VALIDATION, BALANCE, PLANE, CLASSIFICATION, SHAPE

Abstract

OBJECTIVE The subtraction of lumbar lordosis (LL) from the pelvic incidence (PI) offers an estimate of the LL required for a given PI value. Relative LL (RLL) and the lordosis distribution index (LDI) are PI-based individualized measures. RLL quantifies the magnitude of lordosis relative to the ideal lordosis as defined by the magnitude of PI. LDI defines the magnitude of lower arc lordosis in proportion to total lordosis. The aim of this study was to compare RLL and PI - LL for their ability to predict postoperative complications and their correlations with health-related quality of life (HRQOL) scores.