B2M and cervical squamous intraepithelial neoplasia: Li et al. demonstrated that serum β2M exhibited a notably superior predictive value for CIN compared to sCr, with AUC values of 0.842 (p < 0.001) at 24 h and 0.937 (p < 0.001) at 48 h, in contrast to sCr’s lower predictive values (AUC 0.691 and 0.908, respectively).