APOA1 and polyp of large intestine: This study also analyzed the relationship between lipid derivative indexes and colorectal polyps, and found that the serum lipid derivative indexes, including TC/high-density lipoprotein-cholesterol (HDL-C) ratio, TG/HDL-C ratio, LDL-C/HDL-C ratio and ApoB/apolipoprotein A1(ApoA1) ratio were related to colorectal polyps.