Abstract:Objective?? To investigate the diagnosis and prognosis of serum irisin, platelet factor 4 (PF4) and hypoxia inducible factor-1α(HIF-1α) in bladder cancer.Methods?? From October 2018 to June 2020, 75 patients with bladder cancer(disease group) who were diagnosed in our hospital and undergoing radical bladder cancer treatment were selected, and 72 patients with healthy physical examination at the same time (healthy group) were randomly selected. Subjects' general information, surgery-related information, and serum irisin, PF4, HIF-1α levels were collected, and the correlation between serum irisin, PF4, HIF-1α and the occurrence and prognosis of bladder cancer was statistically analyzed.Results?? The levels of serum irisin, PF4 and HIF-1α in the disease group were higher than those in the healthy group (P<0.05), Serum irisin, PF4 and HIF-1α had higher sensitivity (63.25%, 78.30%, 84.96%) and specificity (88.52%, 87.45%, 91.02%) in the diagnosis of bladder cancer (P<0.05). Tumor metastasis, serum irisin, PF4, and HIF-1α levels are independent prognostic factors (P<0.05); the results of multiple linear regression analysis show that serum irisin and HIF-1α are influential factors affecting the prognosis of patients with bladder cancer (P<0.05).? Serum irisin, PF4 and HIF-1α had high sensitivity (70.12%, 89.11%, 86.52%) and specificity (78.96%, 82.23%, 91.07%) in the prognostic assessment of bladder cancer (P<0.05).Conclusions?? Serum irisin, HIF-1α, and PF4 are up-regulated in patients with bladder cancer and are of great value in the diagnosis of bladder cancer; high levels of serum irisin, HIF-1α, and PF4 are associated with poor prognosis of patients with bladder cancer and can be used as predictors of patient prognosis under confounding factors, only serum irisin and HIF-1α can be used as sensitive factors to predict the prognosis of patients with bladder cancer.