RARRES2 and osteoporosis: There was a negative correlation between femoral bone mineral density and chemerin in both groups (R = −0.395, P < 0.01 in osteoporosis group; R = −0.680, P < 0.01 in control) and also a negative correlation between lumbar bone mineral density with chemerin in both groups (R = −0.306, P < 0.01 in osteoporosis group; R = −0.362, P < 0.01 in control).