Table 3.

Clinical characteristics at baseline of BP patients who further relapsed under treatment.

	Patients with secondary appearance of COL7 Ab at relapse (N = 10)	Patients without secondary appearance COL7 Ab at relapse (N = 14)	P value
Mean age ± SD (range), years	79.8 ± 14.3 (45–95)	81.4 ± 9.6 (57.95)	1.00
Sex ratio (female/male)	2.5	1.3	0.52
Total BPDAI (mean ± SD)	57.3 ± 34.0	52.3 ± 17.0	0.72
Skin BPDAI (mean ± SD)	54.2 ± 32.4	51.5 ± 16.7	1.00
Mucosal involvement, no. (%)	6 (60.0)	5 (35.7)	0.24

The clinical characteristics at baseline of BP patients who further relapsed under treatment were analyzed according to the secondary appearance of anti-type VII collagen autoantibodies at relapse (COL7 Ab).

BPDAI, Bullous Pemphigoid Disease Area Index; BP, bullous pemphigoid.