Risk factors of postoperative delirium following spine surgery: A meta-analysis of 50 cohort studies with 1.1 million participants oleh Mingjiang Luo, Di Wang, Yuxin Shi, Qilong Yi, Zhongze Wang, Beijun Zhou, Gaigai Yang, Juemiao Chen, Can Liang, Haoyun Wang, Xin Zeng, Yuxin Yang, Ridong Tan, Yudie Xie, Jiang Chen, Siliang Tang, Jinshan Huang, Zubing Mei, Zhihong Xiao