Figure 1: Relationship between DNA index (DI), tumor size and SSI. (a) The most dispersed of DI values were observed in the tumor size interval 10–20 mm. (b) The relationship between SSI and DI in the DI interval 1.5<DI<2.2 was shown to be significantly negative by linear regression analysis (r = −0.32, p < 0.001; n= 222).