CLDN1 and psoriasis: The combination of IL-17A and Claudin-1 exhibited equal performance in discriminating psoriasis from controls (AUC: 0.949, p < 0.0001), with the model comprising only IL-17A (AUC: 0.951, p < 0.0001), which performed better than the model including just Claudin-1 (AUC: 0.709, p = 0.0119).