CYGB and diabetes mellitus: Factors including age (P < 0.001), operation time (P < 0.001), operation history (P = 0.006), diabetes (P < 0.001), hypertension (P = 0.004), WBC (P < 0.001), HGB (P < 0.001), RBC (P = 0.013), FBG (P < 0.001), GLO (P = 0.014), P (P = 0.039) are statistically correlated to the happen of SSIs (Supplemental Digital Content 1).