“…Eighteen studies measured ICAM-1 in serum [ 81 – 86 , 88 , 89 , 91 , 92 , 94 , 105 , 107 , 109 , 111 , 114 , 116 , 118 ], 2 in plasma [ 104 , 115 ], while the remaining 4 did not provide relevant information [ 97 , 101 , 103 , 113 ]. RA duration was reported in 18 studies and ranged between 0.25 and 23 years [ 81 , 82 , 84 , 85 , 88 , 89 , 92 , 94 , 97 , 100 , 101 , 103 , 105 , 109 , 111 , 114 , 115 , 118 ], whereas DAS-28, reported in six studies, ranged between 2.8 and 6.23 [ 103 , 105 , 109 , 114 , 116 , 118 ]. Eleven studies reported data on methotrexate treatment [ 85 , 86 , 88 , 91 , 92 , 94 , 104 , 111 , 114 , 116 , 118 ], 18 on glucocorticoid treatment [ 81 , 84 , 86 , 88 , 91 , 92 , 94 , 97 ,…”