An (range) Median (range) n Absence Moderate Severe 21 8 13 32 (14?0) 2 (0?) 0 11 10 0 Stage 2 (S2) 37 24 13 35 (16?5) 91 (6?064) 25 10 21Spearman rho coefficient were carried out with statistical significance set at 0.01 (two-tailed test). To calculate sensitivity and specificity of individual predictors with respect to staging, the specific receiver operating characteristic curve of each analyte