A higher expression of APOA1 (≥20 ng/mL) was observed in low grade bladder tumor cases compared with the high grade ones (52.5% vs. 15.4%, respectively), and the difference in expression between the two groups was significant (p = 0.002) with O.R 6.08 (95%C.I = 1.24–29.8; Table 4).Among the different stages of bladder cancer cases, the expression levels of APOA1 at <20 ng/mL were slightly less in the Ta stage (47.6%) compared with those with ≥20 ng/mL levels (52.4%). The gene discussed is APOA1; the disease is urinary bladder cancer.