COL17A1 and Pruritus: Titers of anti-BP180 autoantibodies were strongly correlated with BPDAI (r = 0.557, P  value < 0.0001) and ABSIS (r = 0.570, P  value < 0.0001) values, as well as with BPDAI component for the intensity of pruritus (rho = 0.530, P  value = 0.001) at baseline.