ERBB2 and breast cancer: No significant association was observed between SES and tumour subtype (p = 0.3956), However, we found that women older than 75 years are less likely to have a TN and HR+/HER2+ breast cancer (OR = 0.67; CI95% = [0.47–0.96]) and OR = 0.52; CI95% = [0.37–0.72] respectively).