Compared to control group, the CRC group had higher age (69.50 (62.25–71.00), p < 0.001), higher SBP (systolic blood pressure) (136.50 (125.75–146.50), 0.028), higher positive rate of FOB (19 (90.48%), p < 0.001), higher CEA (5.10 (2.30–15.51), p < 0.001), lower BMI (23.04 (18.74–25.74), p = 0.048), lower UA (345.00 (298.00–404.75), p < 0.015), lower Hb (128.00 (113.50–143.00), p < 0.001) and lower ALT (14.00 (10.50–19.25), p < 0.001). The gene discussed is GSTM1; the disease is colorectal carcinoma.