Therefore, we proposed the Bayesian quantile-based survival method to first estimate covariate-adjusted f-Hb50 and f-Hbp values and then to asses the life-time risk for the multistages of colorectal neoplasia by percentile-based f-Hb given the baseline risk of each colorectal neoplasm. The gene discussed is GSTM1; the disease is colorectal neoplasm.