Fig. 2From: Development and validation of a nomogram for postoperative sleep disturbance in adults: a prospective survey of 640 patients undergoing spinal surgeryRisk factor selection using the LASSO regression model. A: Lasso coefficient profile plot. B: The result of 10-fold Cross-Validation. Dotted vertical lines on the left: the minimum values; dotted vertical lines on the right :the optimal valuesBack to article page