ERBB2 and breast cancer: Younger women have poorer survival rates after breast cancer than older women: Previous research has demonstrated that young age is an independent risk factor for disease recurrence and death, although recent data suggest that this finding may not be true for all EBC subtypes [45] and that younger patients have higher proportions of HER2+ and TN subtypes than older women and are also more likely to be primarily diagnosed with advanced disease [46].