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Fig. 6 | Journal of Orthopaedic Surgery and Research

Fig. 6

From: The influence of early thoracic fusion on the pulmonary function of patients with idiopathic scoliosis in the early period of the second growth peak with different Risser signs

Fig. 6

The receiver operating characteristic (ROC) curve of main variables. FEV1%, the percentage predicted values of forced expiratory volume in 1 s; FVC%, the percentage predicted values of forced vital capacity. T1-T12 height, the straight line distance between the midpoint of the upper endplate at T1 and the midpoint of the lower endplate at T12; MICD, the maximum linear distance between the medial margin of the ribs; APTD, anterior and posterior thoracic diameter, the distance between the anterior chest wall and the anterior border of the vertebral body through the highest point of the diaphragm on the sagittal plane. A ROC curve of FEV1%. B ROC curve of FVC%. C ROC curve of FEV1/FVC. D ROC curve of T1-T12 height. E ROC curve of MICD. F ROC curve of APTD

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