ERBB2 and neoplasm: Differences across tumor subtype for the marital status and mortality association were also evident, with higher MRRs observed for HR+/HER2- tumors (MRR = 1.32; 95% CI: 1.26–1.37) and lower for triple negative tumors (MRR = 1.16; 95% CI: 1.08–1.25).