PI3 and psoriasis: Psoriasis patients exhibited significantly higher serum elafin levels (6.09 ± 8.91) compared with healthy controls (0.40 ± 0.35), with p less than 0.001, and its levels were positively correlated with PASI scores, indicating a link between elafin expression and disease severity (r = 0.467 and p < 0.001).