VEGFA and diabetes mellitus: The analysis shows that DM duration, ABI, FPG, HbA1c, serum VEGF, VEGF in wound tissue, and positive rate of VEGF expression are significant risk factors for non-healing/recurrent DFU (p < 0.001, p = 0.013, p < 0.001, p = 0.020, p < 0.001, p < 0.001, p < 0.001, respectively) (Table 3).