Visfatin expression is positively correlated with ICAM-1 expression in OA patients. (A, B) ELISA analysis showing higher serum visfatin and ICAM-1 levels among OA patients (n=30) compared with healthy controls (n=30). (C) Correlation between levels of visfatin and ICAM-1 expression in serum samples retrieved from OA patients. All ELISA procedures were independently repeated three times. Mann-Whitney testing was applied in (A, B).