The median tumor free survival is 320.5 days for the Rb1∆L/∆L mice compared to 299 days for the Rb1+/+ mice (p=0.0537, log rank test), indicating that Rb1∆L/∆L mice may actually be slightly resistant even though this difference doesn’t reach a 95% confidence interval. The gene discussed is RB1; the disease is neoplasm.