The Study on the Correlation Between the Angle of the Greater Tuberosity Angle of the Humerus Measured by X-ray and Rotator Cuff Tears
Objective To explore the correlation between the greater tuberosity angle(GTA)of the humerus and rotator cuff tear,and provide basis and guidance for the prevention,early diagnosis,and treatment of rotator cuff tear.Methods With the retrospective analysis of the medical records of 138 patients who underwent shoulder X-ray examinations in the radiology department of the hospital from January 2020 to December 2023 due to shoulder pain and discomfort,according to clinical diagnosis,patients with rotator cuff tears were included in the rotator cuff experimental group(64 cases),while patients without rotator cuff tears were included in the control group(74 cases).The GTA results of each patient were independently measured by two radiologists,and the average was taken for statistical analysis.With the comparison of the differences of GTA between the two groups,the critical value and predictive ability of GTA for predicting rotator cuff tears were examined,and the consistency and correlation of the measurement results of two radiologists were evaluated.Results The GTA of the rotator cuff experimental group was higher than that of the control group,and the difference was statistically significant(P<0.05).The optimal critical value of GTA for distinguishing between the rotator cuff experimental group and the control group patients was ≥70°,with the area under receiver operating characteristic(ROC)curve of 0.826,sensitivity and specificity of 0.88 and 0.81,respectively.The intra-class correlation coefficient(ICC)of GTA results measured by two radiologists was 0.677,and Pearson's correlation coefficient r=0.547.Conclusion GTA for rotator cuff tear has good predictive value and higher measurement consistency,providing basis and guidance for the prevention,early diagnosis,and treatment of rotator cuff tears.
Greater tubercle angle of humerusRotator cuff tearX-ray filmBone morphology of proximal humerus
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