Fig. 6

Results of routine analysis of some predictive factors. (A) With the increase of chest wall muscle thickness, the incidence of poor wound healing gradually increased (χ²=4.5, p < 0.001); (B) The orthopedic triangle index showed a nonlinear relationship with the occurrence of poor wound healing (χ²=2.3, p = 0.01); (C) With the increase of the degree of sternal lifting, the incidence of poor wound healing also increased (χ²=5.1, p < 0.001); (D) With the increase of relative chest wall thickness, the incidence of poor wound healing gradually decreased (χ²=4.1, p < 0.001).