ERBB2 and breast cancer: For luminal breast cancer (Luminal A and Luminal B (HER2-)), there was a similar, but weaker pattern: thus, there was a weak positive association if mothers were 163 cm or taller (HR = 1.3, 95% CI, 1.1–1.5 per 2 cm) and no clear association (HR = 1.0, 95% CI, 0.9–1.2 per 2 cm) if maternal height was less than 163 cm (LR-test p = 0.7).