Table 2 presents the results of the logistical regression analysis of risk factors for the 207 patients, but these did not make a significant difference to IBTR risk: age under 50 at diagnosis, family history, clinical presentation (in the form of a nodule), nuclear grade 2/3, pathological tumor size greater than 20 mm, presence of multifocality and comedonecrosis, non-expression of progesterone receptors, final resection margin less than 2 mm, more reinterventions, and the omission of adjuvant radiotherapy. This evidence concerns the gene PGR and neoplasm.