Logistic regression identified lower Hb (p=0.006, OR=0.01) and higher platelet (PLT) count (p=0.016, OR=1.16) as significant predictors of abnormal HRUS findings, with erythrocyte sedimentation rate (ESR) (p=0.010) and vitamin D deficiency (p=0.050) approaching significance. This evidence concerns the gene GSTM1 and vitamin D deficiency.