Within-subject correlation co-efficients (ρw) between mean rCBF and mean VAS-derived estimates of post-surgical pain in each ROI.

Within-subject correlation co-efficients (ρw) between mean rCBF and mean VAS-derived estimates of post-surgical pain in each ROI.各感兴趣区（Region of Interest, ROI）内，平均局部脑血流量（regional cerebral blood flow, rCBF）与基于视觉模拟评分法（Visual Analogue Scale, VAS）得到的术后疼痛评估均值之间的受试者内相关系数（ρw）。