Preoperative Vitamin D, PTH and bone resorption status in patients undergoing lumbar fusion surgery and its seasonal variation

Objectives: Spinal fusion surgery relies on good bone metabolism to prevent complications, such as non-union or proximal junctional kyphosis. To enhance preoperative optimization, this study aims to evaluate the prevalence and seasonal variation of Vitamin D (VitD) deficiency and secondary hyperparathyroidism, [for full text, please go to the a.m. URL]