Analysis Of The Incidence And Risk Factors Of PJK After Osteotomy For Tuberculous Kyphosis

Objective: To analyze the incidence and risk factors of PJK after spine tuberculous kyphosis osteotomy operation.Methods: A retrospective analysis of 63 patients who underwent osteotomy orthopedics from our hospital from January 2012 to January 2018.19 patients occurred PJK during the postoperative follow-up,and the incidence was 30%.Collect basic clinical data and clinical function scores of the two groups,and operation-related parameters,the kyphosis Cobb angle before and after the last follow-up,3 months before and 3 months after the operation,and the PJA angle,fixed segment,and lesion Number of vertebral bodies;surgical complications such as loose screws,broken rods,cerebrospinal fluid leakage,pleural effusion,and reoperation were collected.The imaging parameters of the two groups were compared.The measurement data conforming to the normal distribution are expressed by x±s.The difference between the two groups is tested by t test.The data of the skewed distribution is expressed by M(P25,P75).The Mann Whitney U test is used to compare the differences between the two groups.Differences were compared using the 2 test or Fisher exact probability method;PJK influencing factors were analyzed using unconditional binary multivariate logistic regression analysis.The difference was considered statistically significant at P <0.05.Results: In the patient's overall data,the age and BMI of the two groups,the anteroposterior angle,the preoperative PJA,the number of fixed stages,the number of diseased cones,and the upper fixed vertebra for the cervical-thoracic junction were statistically significant.difference.After multivariate Logistic regression analysis,the results showed that the independent risk factors for PJK after tuberculous kyphosis osteotomy include BMI(OR 17.57,P= 0.000),the number of fixed segment vertebrae(OR5.46,P= 0.088),operation time(OR1.043,P= 0.003).Conclusion: The independent risk factors for PJK after tuberculous kyphosis osteotomy are BMI,preoperative PJA,and the number of fixed stages.