Objectives To adapt the adult spinal deformity frailty index (ASD-FI), which was presented as an instrument for stratification of risk of surgical complications, for application in the Brazilian population. Methods This is a consensus-building study, following the Delphi method, in which a team of six Brazilian spine surgery specialists worked alongside the International Spine Study Group (ISSG), the group responsible for preparing the original version of the ASD-FI, in order to adapt the index for the Brazilian population. The variables to be included in the new version, as well as the translation of the terminology into Portuguese, were evaluated and a consensus was considered to have been reached when all (100%) of the Brazilian experts were in agreement. Results A version of the ASD-FI was created, composed of 42 variables, with the inclusion of two new variables that were not included in the original version. The new version was then back translated into English and approved by the ISSG members, resulting in the adapted version of the ASD-FI for the Brazilian population. Conclusion This study presents an adapted version of the adult spinal deformity frailty index for the Brazilian population, for the purpose of risk stratification in the surgical treatment of these complex deformities. Level of evidence II; Study of adaptation of a valid score.
Objective: To assess the impact of stiffness associated with lumbar spinal fusion on disability and quality of life. Methods: This is a retrospective study including 40 patients (mean age: 57.7 ± 16.2) who underwent spinal surgery with fusion including the lumbar segment and a minimum of 24-month postoperative follow-up. The version translated and adapted to Portuguese of the Lumbar Stiffness Disability Index (LSDI) questionnaire was applied to assess the disability associated with stiffness secondary to lumbar spinal fusion. To quantify postoperative clinical lumbar stiffness / mobility, the Modified-Modified Schober Test (MMST) was applied. Results: There was a moderate negative correlation (r = -0.320), but significant (p = 0.04), between the MMST value and the LSDI score. The average of LSDI score in patients with extension of spinal fusion to the sacrum was higher than in patients without extension to the sacrum (p = 0.002), indicating greater disability in those with extension to the sacrum. Conclusions: In patients undergoing lumbar spinal fusion, the disability related to lumbar stiffness, measured by the LSDI score, was directly related to clinical lumbar stiffness, measured by the modified-modified Schöber test. The inclusion of the sacrum in fusion showed an association with worsening of disability related to lumbar stiffness. Level of evidence III; Retrospective analysis.
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