• World Neurosurg · Dec 2019

    Younger Patients Are Differentially Affected by Stiffness-Related Disability Following Adult Spinal Deformity Surgery.

    • Wesley M Durand, Alan H Daniels, David K Hamilton, Peter G Passias, Han Jo Kim, Themistocles Protopsaltis, Virginie Lafage, Justin S Smith, Christopher Shaffrey, Munish Gupta, Michael P Kelly, Eric Klineberg, Frank Schwab, Doug Burton, Shay Bess, Christopher Ames, Robert Hart, and International Spine Study Group.
    • Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA.
    • World Neurosurg. 2019 Dec 1; 132: e297-e304.

    ObjectiveThe Lumbar Stiffness Disability Index (LSDI) assesses impact of lumbar stiffness on activities of daily living. We hypothesized that patients <60 years old would perceive greater lumbar stiffness-related functional limitation following fusion for adult spinal deformity.MethodsPatients completed the LSDI and Scoliosis Research Society 22 Questionnaire, Revised (SRS-22r) preoperatively and at 2 years postoperatively. The primary independent variable was patient age <60 versus ≥60. Multivariable regression analyses were used.ResultsAnalysis included 267 patients. Patients <60 years old (51.3%) and ≥60 years old (48.7%) were evenly represented. In bivariable analysis, patients age <60 exhibited lower LSDI at baseline versus patients age ≥60 (25.7 vs. 35.5, β -9.8, P < 0.0001), but a directionally smaller difference at 2 years (26.4 vs. 32.3, β -5.8, P = 0.0147). LSDI was associated with lower SRS-22r total score among both age groups at baseline and 2 years (all P < 0.0001); the association was stronger among patients age <60 versus ≥60 at 2 years. LSDI was associated with SRS-22r satisfaction scores at 2 years among patients age <60 (P < 0.0001), but not patients age ≥60 (P = 0.2250). The difference in SRS-22r satisfaction per unit LSDI between patients <60 years old and ≥60 years old was significant (P = 0.0021).ConclusionsAmong patients with adult spinal deformity managed operatively, higher LSDI was associated with inferior SRS-22r total score and satisfaction at 2 years postoperatively. The association between increased LSDI and worse patient-reported outcome measures was greater among patients age <60 versus ≥60. Preoperative counseling is needed for patients age <60 undergoing adult spinal deformity surgery regarding effects that lumbar stiffness may have on postoperative function and satisfaction.Copyright © 2019 Elsevier Inc. All rights reserved.

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