Medical Complications After Adult Spinal Deformity Surgery: Incidence, Risk Factors, and Clinical Impact

i) Study design: Retrospective review of a prospective multicenter database
ii) Independent predictors of medical complications: hypertension (IRR 2.43 P = 0.0001), smoking (IRR 2.49 P = 0.0001), and duration of spine symptoms(IRR 1.23 P = 0.03)

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