Fig. 4From: 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 signsPreoperative pulmonary function tests (PFTs). FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; FEV1%, the percentage predicted values of FEV1; FVC%, the percentage predicted values of FVC.*p < 0.05Back to article page