Characterization of @entity2331 / XXXX in @entity1635 : does bone density affect surgical outcome?

@entity1 @entity3604 @entity170 @entity1635 @entity79 @entity2331
STUDY DESIGN: Retrospective study. OBJECTIVE: The aim of this study is to validate the prevalence of low @entity79 ( @entity79 ) in @entity1 @entity1 with @entity1635 and to relate that to surgical treatment outcome. Despite reports of the high prevalence of low @entity79 among female with adolescent idiopathic, these findings have not been substantiated in any comprehensive review of @entity1635 @entity1 undergoing surgical treatment. SUMMARY OF BACKGROUND DATA: It has been suggested that @entity1635 may predispose to @entity170 and that degenerative @entity1635 could falsely elevate spinal @entity79 measurements with dual energy radiograph absorptiometry (DXA). The discordance between hip and spine @entity79 measurement using DXA has also been shown in previous cross-sectional study for adult population. METHODS: A retrospective review of 176 @entity1 treated surgically for @entity1635 . @entity79 of the lumbar spine and femoral neck were determined by DXA. @entity1 were categorized as follows: concordance ( @entity170 , @entity2331 , or normal @entity79 on both sites), minor discordance ( @entity170 in one site and @entity2331 in the other site), and major discordance ( @entity170 in one site and normal the other site). Body mass index (BMI), preoperative Cobb angle, fusion ratio, and complication were recorded. Statistical analysis included the Student t test,   (2) test, regression coefficient test, and simple linear regression. P value was set at P < 0.05. RESULTS: The mean age was 51    12 years (26-82 years). The mean T score of the hip was -1.23    0.89 and of the spine was -0.52    1.57. Major discordance in @entity79 7 (4%) points, minor discordance 68 (39%) points, and concordance was 101 (57%) points. There was moderate correlation between T score of hip and spine (R = 0.55P < 0.01). T score of the hip and of the spine showed 10.8% and 10.2% of the @entity1 were @entity3604 . The mean Z score of the hip and of the spine showed comparable age and sex matched values. No correlation was observed between @entity79 and Cobb angle (R = 0.05, P = 0.464). The fusion rate was 93% and surgical complication rate was 14.9%. No significant correlation was observed between @entity79 and fusion (P = 0.80) complication (P = 0.13). CONCLUSION: Comparable bone density exists among @entity1635 @entity1 with no correlation between @entity79 and curve magnitude, fusion and complication rates. The difference in @entity79 of the hip and of spine cannot be fully explained in the review. These results will guide in surgical planning, @entity1 selection on the treatment options.
