CRP and hypertensive disorder: Based on the independent risk factors established by logistic risk regression analysis, namely, a history of perioperative blood transfusion, a high level of C-reactive protein (CRP), a D-dimer concentration >500 μg/L, a history of hypertension, an age ≥60 years, and prolonged bed rest, a total of six items were given the sequential numbers of X1–X6 to complete the extraction of partial regression coefficients of the predictors, which described the perioperative DVT risk warning model for patients who underwent spinal fracture.