Correlation of serum anti-BP180 NC16A titers with total BP Disease Area Index (BPDAI) (A,E), total skin BPDAI (B,F), blister/erosion BPDAI (C,G), and erythema/urticaria BPDAI (D,H) scores in bullous pemphigoid patients without (A–D) or with (E–H) mucosal involvement. The correlation coefficients and statistical significances were calculated according to Spearman’s correlation test and are summarized in Table 4.